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From eye exams to blood tests and surgery: how doctors use light to diagnose disease

<div class="theconversation-article-body"><em><a href="https://theconversation.com/profiles/matthew-griffith-1539353">Matthew Griffith</a>, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a></em></p> <p>You’re not feeling well. You’ve had a pounding headache all week, dizzy spells and have vomited up your past few meals.</p> <p>You visit your GP to get some answers and sit while they shine a light in your eyes, order a blood test and request some medical imaging.</p> <p>Everything your GP just did relies on light. These are just some of the optical technologies that have had an enormous impact in how we diagnose disease.</p> <h2>1. On-the-spot tests</h2> <p>Point-of-care diagnostics allow doctors to test patients on the spot and get answers in minutes, rather than sending samples to a lab for analysis.</p> <p>The “flashlight” your GP uses to view the inside of your eye (known as an <a href="https://medlineplus.gov/ency/article/003881.htm">ophthalmoscope</a>) is a great example. This allows doctors to detect abnormal blood flow in the eye, deformations of the cornea (the outermost clear layer of the eye), or swollen optical discs (a round section at the back of the eye where the nerve link to the brain begins). Swollen discs are a sign of elevated pressure inside your head (or in the worst case, a brain tumour) that could be <a href="https://www.hopkinsmedicine.org/health/conditions-and-diseases/headache/increased-intracranial-pressure-icp-headache">causing your headaches</a>.</p> <p>The invention of <a href="https://openmedscience.com/lighting-the-way-in-healthcare-the-transformative-role-of-lasers-in-medicine/">lasers and LEDs</a> has enabled many other miniaturised technologies to be provided at the bedside or clinic rather than in the lab.</p> <p><a href="https://theconversation.com/whats-a-pulse-oximeter-should-i-buy-one-to-monitor-covid-at-home-174457">Pulse oximetry</a> is a famous example, where a clip attached to your finger reports how well your blood is oxygenated. It does this by <a href="https://www.howequipmentworks.com/pulse_oximeter/">measuring</a> the different responses of oxygenated and de-oxygenated blood to different colours of light.</p> <p>Pulse oximetry is used at hospitals (and <a href="https://theconversation.com/whats-a-pulse-oximeter-should-i-buy-one-to-monitor-covid-at-home-174457">sometimes at home</a>) to monitor your respiratory and heart health. In hospitals, it is also a valuable tool for detecting <a href="https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(12)60107-X/fulltext">heart defects in babies</a>.</p> <h2>2. Looking at molecules</h2> <p>Now, back to that blood test. Analysing a small amount of your blood can diagnose <a href="https://theconversation.com/blood-tests-and-diagnosing-illness-what-can-blood-tell-us-about-whats-happening-in-our-body-80327">many different diseases</a>.</p> <p>A machine called an automated “full blood count analyser” tests for general markers of your health. This machine directs focused beams of light through blood samples held in small glass tubes. It counts the number of blood cells, determines their specific type, and reports the level of haemoglobin (the protein in red blood cells that distributes oxygen around your body). In minutes, this machine can provide a <a href="https://www.nuffieldhealth.com/article/inside-the-pathology-lab-what-happens-to-my-blood">snapshot</a> of your overall health.</p> <p>For more specific disease markers, blood serum is separated from the heavier cells by spinning in a rotating instrument called a centrifuge. The serum is then exposed to special chemical stains and enzyme assays that change colour depending on whether specific molecules, which may be the sign of a disease, are present.</p> <p>These colour changes can’t be detected with the naked eye. However, a light beam from an instrument called a <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5476943/#R88">spectrometer</a> can detect tiny amounts of these substances in the blood and determine if the biomarkers for diseases are present, and at what levels.</p> <h2>3. Medical imaging</h2> <p>Let’s re-visit those medical images your GP ordered. The development of fibre-optic technology, made famous for transforming high-speed digital communications (such as the NBN), allows light to get inside the body. The result? High-resolution optical imaging.</p> <p>A common example is an <a href="https://www.medicalnewstoday.com/articles/153737#risks-and-side-effects">endoscope</a>, where fibres with a tiny camera on the end are inserted into the body’s natural openings (such as your mouth or anus) to examine your gut or respiratory tracts.</p> <p>Surgeons can insert the same technology through tiny cuts to view the inside of the body on a video screen during <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9553337/">laparoscopic surgery</a> (also known as keyhole surgery) to diagnose and treat disease.</p> <h2>How about the future?</h2> <p>Progress in nanotechnology and a better understanding of the interactions of light with our tissues are leading to new light-based tools to help diagnose disease. These include:</p> <ul> <li> <p><a href="https://onlinelibrary.wiley.com/doi/full/10.1002/advs.201903441">nanomaterials</a> (materials on an extremely small scale, many thousands of times smaller than the width of a human hair). These are being used in next-generation sensors and new diagnostic tests</p> </li> <li> <p><a href="https://www.nature.com/articles/s41587-019-0045-y">wearable optical biosensors</a> the size of your fingernail can be included in devices such as watches, contact lenses or finger wraps. These devices allow non-invasive measurements of sweat, tears and saliva, in real time</p> </li> <li> <p>AI tools to analyse how blood serum scatters infrared light. This has allowed researchers to build a <a href="https://www.advancedsciencenews.com/powerful-diagnostic-approach-uses-light-to-detect-virtually-all-forms-of-cancer/">comprehensive database</a> of scatter patterns to detect <a href="https://onlinelibrary.wiley.com/doi/full/10.1002/aisy.202300006">any cancer</a></p> </li> <li> <p>a type of non-invasive imaging called <a href="https://www.ncbi.nlm.nih.gov/books/NBK554044/">optical coherence tomography</a> for more detailed imaging of the eye, heart and skin</p> </li> <li> <p>fibre optic technology to deliver a tiny microscope into the body on the <a href="https://www.uwa.edu.au/projects/microscope-in-a-needle">tip of a needle</a>.</p> </li> </ul> <p>So the next time you’re at the GP and they perform (or order) some tests, chances are that at least one of those tests depend on light to help diagnose disease.<!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/231379/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https://theconversation.com/republishing-guidelines --></p> <p><a href="https://theconversation.com/profiles/matthew-griffith-1539353"><em>Matthew Griffith</em></a><em>, Associate Professor and ARC Future Fellow and Director, UniSA Microscopy and Microanalysis Facilities, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/from-eye-exams-to-blood-tests-and-surgery-how-doctors-use-light-to-diagnose-disease-231379">original article</a>.</em></p> </div>

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Woman cured of Type 1 diabetes in life-changing clinical trial

<p>Marlaina Goedel was diagnosed with Type 1 diabetes when she was just five-years-old, and not only was the disease controlling her, but it almost cost her life. </p> <p>"I've crashed my car into a brick building before having a diabetic attack while driving," Goedel recalled. </p> <p>Her condition was so extreme that she felt robbed of a normal childhood, telling the <em>Daily Mail </em>that she was in and out of hospital with  life-threatening diabetic ketoacidosis, which causes toxic chemicals to build up in the blood due to a lack of insulin.</p> <p>Now 30-years-old, the Illinois woman no longer needs daily insulin shots and can finally enjoy sugar again thanks to a pioneering stem cell therapy that has cured her of type 1 diabetes. </p> <p>Goedel was one of three Americans who have been cured of their type 1 diabetes thanks to the clinical trial involving an islet cell transplant. </p> <p>It is a one-off infusion that involved transplanting islet cells into her liver to help her body produce insulin on its own. </p> <p>After four weeks, she no longer needed to take insulin. </p> <p>"[My doctor] said, ‘Mark it on your calendar. Today is the day. Stop all insulin,'" Goedel said of the life-changing moment. </p> <p>"I just went quiet and finally said, ‘I’m here. I’m in shock. I’m going to need you to repeat that.’"</p> <p>The trial was being run at the University of Chicago Medicine Transplant Institute. </p> <p>While Islet cell transplants isn't a new procedure, the current anti-rejection medication used can be toxic to the transplanted cells, potentially making it less effective over time. </p> <p>The clinical trial that ran at the university tested out a new antibody called tegoprubart, which was given to Goedel and the two other patients. </p> <p>Tegoprubart is made from lab-made antibodies that trick the immune system into thinking the body made the cells on its own, preventing them from being rejected. </p> <p>The patients were then given islet cells from a deceased donor's pancreas, which were then infused into the patient's small blood vessels in their liver. Those cells then lodged into the blood vessels and started producing insulin. </p> <p>For Goedel the only side effect of the procedure was "feeling like I got punched in the ribs,"  with the procedure lasting just an hour. </p> <p>"The cure is out there," Goedel told the <em>Daily Mail. </em></p> <p>With her new lease on life, Goedel plans to go back to school and go horse riding without worrying about suffering an attack and causing an accident. </p> <p>"It took a while to get used to saying, 'I am cured. I am diabetes free.' It's been very freeing," she said.</p> <p>"No one should have to live with this disease. I know that now more than ever."</p> <p><em>Images: Good Morning America/ UChicago Medicine</em></p> <p> </p>

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For type 2 diabetes, focusing on when you eat – not what – can help control blood sugar

<div class="theconversation-article-body"> <p><em><a href="https://theconversation.com/profiles/evelyn-parr-441878">Evelyn Parr</a>, <a href="https://theconversation.com/institutions/australian-catholic-university-747">Australian Catholic University</a> and <a href="https://theconversation.com/profiles/brooke-devlin-2237174">Brooke Devlin</a>, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a></em></p> <p>Type 2 diabetes affects <a href="https://www.aihw.gov.au/reports/diabetes/diabetes/contents/how-common-is-diabetes/type-2-diabetes">1.2 million Australians</a> and accounts for <a href="https://www.diabetesaustralia.com.au/about-diabetes/type-2-diabetes/">85-90%</a> of all diabetes cases. This chronic condition is characterised by high blood glucose (sugar) levels, which carry serious <a href="https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(17)30058-2/abstract">health</a> risks. <a href="https://www.nature.com/articles/nrendo.2017.151">Complications</a> include heart disease, kidney failure and vision problems.</p> <p>Diet is an important way people living with type 2 diabetes manage blood glucose, alongside exercise and medication. But while we know individualised, professional dietary advice improves blood glucose, it can be <a href="https://linkinghub.elsevier.com/retrieve/pii/S0168822717317588">complex</a> and is not always <a href="https://www.publish.csiro.au/py/PY13021">accessible</a>.</p> <p><a href="https://www.sciencedirect.com/science/article/pii/S0168822724008039">Our new study</a> looked at the impact of time-restricted eating – focusing on when you eat, rather than what or how much – on blood glucose levels.</p> <p>We found it had similar results to individualised advice from an accredited practising dietitian. But there were added benefits, because it was simple, achievable, easy to stick to – and motivated people to make other positive changes.</p> <h2>What is time-restricted eating?</h2> <p>Time-restricted eating, also known as <a href="https://www.annualreviews.org/content/journals/10.1146/annurev-nutr-082018-124320">the 16:8 diet</a>, became popular for weight loss around 2015. Studies have since shown it is also an <a href="https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2811116">effective way</a> for people with type 2 diabetes to manage blood glucose.</p> <p>Time-restricted eating involves limiting when you eat each day, rather than focusing on what you eat. You restrict eating to a window during daylight hours, for example between 11am and 7pm, and then fast for the remaining hours. This can sometimes naturally lead to also eating less.</p> <p>Giving your body a break from constantly digesting food in this way helps align eating with natural <a href="https://doi.org/10.1111/jne.12886">circadian rhythms</a>. This <a href="https://doi.org/10.1111/jnc.15246">can help</a> regulate metabolism and improve overall health.</p> <p>For people with type 2 diabetes, there may be specific benefits. They often have their <a href="https://doi.org/10.2337/dc12-2127">highest blood glucose</a> reading in the morning. Delaying breakfast to mid-morning means there is time for physical activity to occur to help reduce glucose levels and prepare the body for the first meal.</p> <h2>How we got here</h2> <p>We ran an <a href="https://www.mdpi.com/2072-6643/12/11/3228">initial study</a> in 2018 to see whether following time-restricted eating was achievable for people with type 2 diabetes. We found participants could easily stick to this eating pattern over four weeks, for an average of five days a week.</p> <p>Importantly, they also had improvements in blood glucose, spending less time with high levels. <a href="https://www.mdpi.com/2072-6643/12/2/505">Our previous research</a> suggests the reduced time between meals may play a role in how the hormone insulin is able to reduce glucose concentrations.</p> <p><a href="https://doi.org/10.1001/jamanetworkopen.2023.39337">Other studies</a> have confirmed these findings, which have <a href="https://doi.org/10.1186/s12986-021-00613-9">also shown</a> notable improvements in HbA1c. This is a <a href="https://www.ncbi.nlm.nih.gov/books/NBK304271/">marker</a> in the blood that represents concentrations of blood glucose over an average of three months. It is the <a href="https://journals.sagepub.com/doi/10.4137/BMI.S38440">primary clinical tool</a> used for diabetes.</p> <p>However, these studies provided intensive support to participants through weekly or fortnightly meetings with researchers.</p> <p>While we know this level of support <a href="https://www.nature.com/articles/0802295">increases</a> how likely people are to stick to the plan and improves outcomes, it is not readily available to everyday Australians living with type 2 diabetes.</p> <h2>What we did</h2> <p>In our <a href="https://www.sciencedirect.com/science/article/pii/S0168822724008039">new study</a>, we compared time-restricted eating directly with advice from an <a href="https://dietitiansaustralia.org.au/working-dietetics/standards-and-scope/role-accredited-practising-dietitian">accredited practising dietitian</a>, to test whether results were similar across six months.</p> <p>We recruited 52 people with type 2 diabetes who were currently managing their diabetes with up to two oral medications. There were 22 women and 30 men, aged between 35 and 65.</p> <p>Participants were randomly divided into two groups: diet and time-restricted eating. In both groups, participants received four consultations across the first four months. During the next two months they managed diet alone, without consultation, and we continued to measure the impact on blood glucose.</p> <p>In the diet group, consultations focused on changing their diet to control blood glucose, including improving diet quality (for example, eating more vegetables and limiting alcohol).</p> <p>In the time-restricted eating group, advice focused on how to limit eating to a nine-hour window between 10am and 7pm.</p> <p>Over six months, we measured each participant’s blood glucose levels every two months using the HbA1c test. Each fortnight, we also asked participants about their experience of making dietary changes (to what or when they ate).</p> <h2>What we found</h2> <p>We found time-restricted eating was as effective as the diet intervention.</p> <p>Both groups had reduced blood glucose levels, with the greatest improvements occurring after the first two months. Although it wasn’t an objective of the study, some participants in each group also lost weight (5-10kg).</p> <p>When surveyed, participants in the time-restricted eating group said they had adjusted well and were able to follow the restricted eating window. Many told us they had family support and enjoyed earlier mealtimes together. Some also found they slept better.</p> <p>After two months, people in the time-restricted group were looking for more dietary advice to further improve their health.</p> <p>Those in the diet group were less likely to stick to their plan. Despite similar health outcomes, time-restricted eating seems to be a simpler initial approach than making complex dietary changes.</p> <h2>Is time-restricted eating achievable?</h2> <p>The main barriers to following time-restricted eating are social occasions, caring for others and work schedules. These factors may prevent people eating within the window.</p> <p>However, there are many benefits. The message is simple, focusing on when to eat as the main diet change. This may make time-restricted eating more translatable to people from a wider variety of socio-cultural backgrounds, as the types of foods they eat don’t need to change, just the timing.</p> <p>Many people don’t have access to more individualised support from a dietitian, and receive nutrition advice from their GP. This makes time-restricted eating an alternative – and equally effective – strategy for people with type 2 diabetes.</p> <p>People should still try to stick to <a href="https://www.eatforhealth.gov.au/guidelines/guidelines">dietary guidelines</a> and prioritise vegetables, fruit, wholegrains, lean meat and healthy fats.</p> <p>But our study showed time-restricted eating may also serve as stepping stone for people with type 2 diabetes to take control of their health, as people became more interested in making diet and other positive changes.</p> <p>Time-restricted eating might not be appropriate for everyone, especially people on medications which don’t recommend fasting. Before trying this dietary change, it’s best speak to the healthcare professional who helps you manage diabetes.<!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/241472/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https://theconversation.com/republishing-guidelines --></p> <p><em><a href="https://theconversation.com/profiles/evelyn-parr-441878">Evelyn Parr</a>, Research Fellow in Exercise Metabolism and Nutrition, Mary MacKillop Institute for Health Research, <a href="https://theconversation.com/institutions/australian-catholic-university-747">Australian Catholic University</a> and <a href="https://theconversation.com/profiles/brooke-devlin-2237174">Brooke Devlin</a>, Lecturer in Nutrition and Dietetics, School of Human Movement and Nutrition Sciences, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/for-type-2-diabetes-focusing-on-when-you-eat-not-what-can-help-control-blood-sugar-241472">original article</a>.</em></p> </div>

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What is type 1.5 diabetes? It’s a bit like type 1 and a bit like type 2 – but it’s often misdiagnosed

<div class="theconversation-article-body"> <p><em><a href="https://theconversation.com/profiles/emily-burch-438717">Emily Burch</a>, <a href="https://theconversation.com/institutions/southern-cross-university-1160">Southern Cross University</a> and <a href="https://theconversation.com/profiles/lauren-ball-14718">Lauren Ball</a>, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a></em></p> <p>While you’re likely familiar with type 1 and type 2 diabetes, you’ve probably heard less about type 1.5 diabetes.</p> <p>Also known as latent autoimmune diabetes in adults (LADA), type 1.5 diabetes has features of <a href="https://diabetesjournals.org/diabetes/article/69/10/2037/16062/Management-of-Latent-Autoimmune-Diabetes-in-Adults">both type 1 and type 2 diabetes</a>.</p> <p>More people became aware of this condition after <a href="https://www.imdb.com/name/nm0004726/">Lance Bass</a>, best known for his role in the iconic American pop band NSYNC, <a href="https://www.foxnews.com/health/pop-singer-lance-bass-type-1-5-diabetes-know-disease">recently revealed</a> he has it.</p> <p>So, what is type 1.5 diabetes? And how is it diagnosed and treated?</p> <h2>There are several types of diabetes</h2> <p>Diabetes mellitus is a group of conditions that arise when the levels of glucose (sugar) in our blood are higher than normal. There are actually <a href="https://diabetesjournals.org/care/article/37/Supplement_1/S81/37753/Diagnosis-and-Classification-of-Diabetes-Mellitus">more than ten types</a> of diabetes, but the <a href="https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(23)01301-6/fulltext">most common</a> are type 1 and type 2.</p> <p>Type 1 diabetes is an <a href="https://diabetesjournals.org/care/article/44/11/2589/138492/The-Management-of-Type-1-Diabetes-in-Adults-A">autoimmune condition</a> where the body’s immune system attacks and destroys the cells in the pancreas that make the hormone insulin. This leads to very little or no insulin production.</p> <p>Insulin is important for moving glucose from the blood into our cells to be used for energy, which is why people with type 1 diabetes need <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6995794/">insulin medication daily</a>. Type 1 diabetes usually <a href="https://www.nature.com/articles/s41390-024-03107-5">appears</a> in children or young adults.</p> <p>Type 2 diabetes is not an autoimmune condition. Rather, it happens when the body’s cells become resistant to insulin over time, and the pancreas is no longer able to make enough insulin to <a href="https://diabetesjournals.org/care/article/47/Supplement_1/S20/153954/2-Diagnosis-and-Classification-of-Diabetes">overcome this resistance</a>. Unlike type 1 diabetes, people with type 2 diabetes still produce some insulin.</p> <p>Type 2 is more common in adults but is <a href="https://www.sciencedirect.com/science/article/abs/pii/S1871402121002733">increasingly</a> seen in children and young people. Management <a href="https://www.racgp.org.au/getattachment/41fee8dc-7f97-4f87-9d90-b7af337af778/Management-of-type-2-diabetes-A-handbook-for-general-practice.aspx">can include</a> behavioural changes such as nutrition and physical activity, as well as oral medications and insulin therapy.</p> <h2>How does type 1.5 diabetes differ from types 1 and 2?</h2> <p>Like type 1 diabetes, type 1.5 occurs when the immune system attacks the pancreas cells that make insulin. But people with type 1.5 often don’t need insulin <a href="https://diabetesjournals.org/diabetes/article/69/10/2037/16062/Management-of-Latent-Autoimmune-Diabetes-in-Adults">immediately</a> because their condition develops more slowly. Most people with type 1.5 diabetes will need to use insulin within <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5111528/">five years</a> of diagnosis, while those with type 1 typically require it from diagnosis.</p> <p>Type 1.5 diabetes is usually diagnosed in people <a href="https://diabetesjournals.org/diabetes/article/69/10/2037/16062/Management-of-Latent-Autoimmune-Diabetes-in-Adults">over 30</a>, likely due to the slow progressing nature of the condition. This is older than the typical age for type 1 diabetes but younger than the usual diagnosis age for type 2.</p> <p>Type 1.5 diabetes shares <a href="https://www.nature.com/articles/nrendo.2017.99">genetic and autoimmune risk factors</a> with type 1 diabetes such as specific gene variants. However, evidence has also shown it may be influenced by lifestyle factors such as <a href="https://pubmed.ncbi.nlm.nih.gov/29589073/">obesity</a> and <a href="https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2019.00320/full">physical inactivity</a> which are more commonly associated with type 2 diabetes.</p> <h2>What are the symptoms, and how is it treated?</h2> <p>The symptoms of type 1.5 diabetes are highly variable between people. Some have no symptoms at all. But generally, people may experience the following <a href="https://www.ncbi.nlm.nih.gov/books/NBK557897/">symptoms</a>:</p> <ul> <li>increased thirst</li> <li>frequent urination</li> <li>fatigue</li> <li>blurred vision</li> <li>unintentional weight loss.</li> </ul> <p>Typically, type 1.5 diabetes is <a href="https://diabetesjournals.org/diabetes/article/69/10/2037/16062/Management-of-Latent-Autoimmune-Diabetes-in-Adults">initially treated</a> with oral medications to keep blood glucose levels in normal range. Depending on their glucose control and the medication they are using, people with type 1.5 diabetes may need to monitor their blood glucose levels regularly throughout the day.</p> <p>When average blood glucose levels increase beyond normal range even with oral medications, treatment may progress to insulin. However, there are <a href="https://www.frontiersin.org/journals/endocrinology/articles/10.3389/fendo.2022.959011/full">no universally accepted</a> management or treatment strategies for type 1.5 diabetes.</p> <h2>Type 1.5 diabetes is often misdiagnosed</h2> <p>Lance Bass said he was initially diagnosed with <a href="https://www.healthline.com/health-news/lance-bass-misdiagnosed-diabetes">type 2 diabetes</a>, but later learned he actually has type 1.5 diabetes. This is <a href="https://journals.lww.com/jaanp/abstract/2009/03000/latent_autoimmune_diabetes_of_adulthood__lada___an.4.aspx">not entirely uncommon</a>. Estimates suggest type 1.5 diabetes is misdiagnosed as type 2 diabetes <a href="https://www.sciencedirect.com/science/article/abs/pii/S1043276018301292">5–10% of the time</a>.</p> <p>There are a few possible reasons for this.</p> <p>First, accurately diagnosing type 1.5 diabetes, and distinguishing it from other types of diabetes, requires special <a href="https://journals.lww.com/jaanp/abstract/2009/03000/latent_autoimmune_diabetes_of_adulthood__lada___an.4.aspx">antibody tests</a> (a type of blood test) to detect autoimmune markers. Not all health-care professionals necessarily order these tests routinely, either due to cost concerns or because they may not consider them.</p> <p>Second, type 1.5 diabetes is commonly found in adults, so doctors might wrongly assume a person has developed type 2 diabetes, which is more common in this age group (whereas type 1 diabetes usually affects children and young adults).</p> <p>Third, people with <a href="https://diabetesjournals.org/diabetes/article/69/10/2037/16062/Management-of-Latent-Autoimmune-Diabetes-in-Adults">type 1.5 diabetes</a> often initially make enough insulin in the body to manage their blood glucose levels without needing to start insulin medication. This can make their condition appear like type 2 diabetes, where people also produce some insulin.</p> <p>Finally, because type 1.5 diabetes has <a href="https://www.ncbi.nlm.nih.gov/books/NBK557897/">symptoms</a> that are similar to type 2 diabetes, it may initially be treated as type 2.</p> <h2>We’re still learning about type 1.5</h2> <p>Compared with type 1 and type 2 diabetes, there has been much less research on how common type 1.5 diabetes is, especially in <a href="https://www.sciencedirect.com/science/article/abs/pii/S1043276018301292">non-European populations</a>. In 2023, it was estimated type 1.5 diabetes represented <a href="https://pubmed.ncbi.nlm.nih.gov/37428296/">8.9%</a> of all diabetes cases, which is similar to type 1. However, we need more research to get accurate numbers.</p> <p>Overall, there has been a limited awareness of type 1.5 diabetes and <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10683931/">unclear diagnostic criteria</a> which have slowed down our understanding of this condition.</p> <p>A misdiagnosis can be stressful and confusing. For people with type 1.5 diabetes, being misdiagnosed with type 2 diabetes might mean they don’t get the insulin they need in a timely manner. This can lead to worsening health and a greater likelihood of complications down the road.</p> <p>Getting the right diagnosis helps people receive the most appropriate treatment, save money, and reduce <a href="https://diabetesjournals.org/diabetes/article/73/Supplement_1/55-OR/155112/55-OR-Diabetes-Distress-among-Persons-Living-with">diabetes distress</a>. If you’re experiencing symptoms you think may indicate diabetes, or feel unsure about a diagnosis you’ve already received, monitor your symptoms and chat with your doctor.<!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/237041/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https://theconversation.com/republishing-guidelines --></p> <p><em><a href="https://theconversation.com/profiles/emily-burch-438717">Emily Burch</a>, Accredited Practising Dietitian and Lecturer, <a href="https://theconversation.com/institutions/southern-cross-university-1160">Southern Cross University</a> and <a href="https://theconversation.com/profiles/lauren-ball-14718">Lauren Ball</a>, Professor of Community Health and Wellbeing, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a></em></p> <p><em>Image credits: Shutterstock</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/what-is-type-1-5-diabetes-its-a-bit-like-type-1-and-a-bit-like-type-2-but-its-often-misdiagnosed-237041">original article</a>.</em></p> </div>

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Does eating ham, bacon and beef really increase your risk of developing type 2 diabetes?

<div class="theconversation-article-body"><em><a href="https://theconversation.com/profiles/duane-mellor-136502">Duane Mellor</a>, <a href="https://theconversation.com/institutions/aston-university-1107">Aston University</a></em></p> <p>That lunchtime staple, the humble ham sandwich, has come in for a bashing in the press recently. According to <a href="https://www.theguardian.com/society/article/2024/aug/20/two-slices-of-ham-a-day-can-raise-type-2-diabetes-risk-by-15-research-suggests">many</a> <a href="https://www.dailymail.co.uk/health/article-13761253/Eating-ham-daily-linked-increase-risk-diabetes.html">reports</a>, eating two slices of ham a day can increase your risk of developing type 2 diabetes.</p> <p>But what’s the science behind these headlines?</p> <p>The research offers a more complex picture. <a href="https://www.thelancet.com/journals/landia/article/PIIS2213-8587(24)00179-7/fulltext">A new study</a> from the University of Cambridge highlighted an association between developing type 2 diabetes and eating processed meat like ham and bacon, and red meat such as beef and lamb.</p> <p>This led to headlines suggesting the risk was mainly linked to <a href="https://www.telegraph.co.uk/news/2024/08/21/ham-sandwich-processed-meat-fresh-risk-link-type-2-diabetes/">ham sandwiches</a>. This seems to have come from the <a href="https://www.cam.ac.uk/research/news/red-and-processed-meat-consumption-associated-with-higher-type-2-diabetes-risk">press release</a>, which used ham as the example to quantify the amount of processed meat associated with a 15% increased risk of developing type 2 diabetes over ten years.</p> <p>The research found that this risk was linked to eating an extra 50g of processed meat every day, which happens to equate to two slices of ham. A useful example thus appears to have been taken up by the media as the main cause, perhaps ignoring some of the key messages coming from the study.</p> <p>So, can processed and red meat really increase your risk of developing type 2 diabetes?</p> <p>The <a href="https://www.diabetes.org.uk/diabetes-the-basics/types-of-diabetes/type-2/diabetes-risk-factors">biggest risk factors</a> linked to developing type 2 diabetes are being over 40, having family members with type 2 diabetes, being of South Asian or African descent, or having a higher body weight – and especially a larger waist.</p> <figure><iframe src="https://www.youtube.com/embed/EsOBcx2bJqU?wmode=transparent&amp;start=0" width="440" height="260" frameborder="0" allowfullscreen="allowfullscreen"></iframe></figure> <p>The Cambridge study used data from nearly 2 million people from 31 studies. Participants were followed for an average of ten years. During this time, around one in 20 people developed type 2 diabetes.</p> <p>The research suggested that a 10% increase in the probability of developing type 2 diabetes was associated with every 100g of additional red meat eaten daily. Eating half as much extra processed meat every day was linked to an even greater increased risk of developing the disease.</p> <p>This is not the <a href="https://ajcn.nutrition.org/article/S0002-9165(23)66119-2/abstract">first time</a> that both processed and red meats have been linked with an increased risk of developing type 2 diabetes. However, the key strength of the Cambridge study was that it tried to control for many of the other factors linked to the disease, including smoking, having a higher body weight, dietary intake and exercise.</p> <p>However, the size of the increased risk is modest, considering few people included in the study ate 50g or more processed meat per day – meaning moderate ham consumption is likely to have <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9908545/">no meaningful effect</a> on your risk.</p> <h2>What’s the link?</h2> <p>Processed meat has been linked to increased risk of type 2 diabetes because of its nitrate and salt content – additives that are used to cure many processed meats.</p> <p>Nitrates and salt in processed meats have also <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6893523/">been linked to</a> an increased risk of developing colon cancer. In fact, the World Health Organization classifies the additives as <a href="https://www.who.int/news-room/questions-and-answers/item/cancer-carcinogenicity-of-the-consumption-of-red-meat-and-processed-meat">group 1 carcinogens</a>, which means they can cause a range of cancers.</p> <p>The mechanism linking processed meat to cancer seems to be similar to how it might be linked to type 2 diabetes. During digestion, processed meat produces <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6294997/">N-nitroso chemicals</a>, which can damage cells. This can lead to inflammation and affects how insulin, the hormone that controls blood glucose (sugar), works. This in turn can lead to <a href="https://www.niddk.nih.gov/health-information/diabetes/overview/what-is-diabetes/prediabetes-insulin-resistance">insulin resistance</a>, when cells in your muscles, fat and liver don’t respond well to insulin and can’t easily take up glucose from your blood.</p> <p>Red meat, meanwhile, is <a href="https://www.healthline.com/nutrition/healthy-iron-rich-foods">rich in iron</a>. Research suggests that people with <a href="https://www.diabetes.org.uk/diabetes-the-basics/related-conditions/haemochromatosis-diabetes#:%7E:text=So%20a%20rise%20of%20iron,GP%20as%20soon%20as%20possible.">high levels of iron</a> are more likely to develop type 2 diabetes. However, <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8744124/#:%7E:text=The%20WHO%20has%20recognised%20iron,being%20affected%20with%20this%20condition.">low levels of iron</a> are more of a health concern for the general population.</p> <p>Another potential link regarding red meat could be the way it is cooked.</p> <p><a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5521980/">Previous studies</a> have suggested that charred meat, cooked over an open flame or at high temperature, is also linked to an increased risk of developing <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5911789/">type 2 diabetes</a>. Charring meat leads to formation of toxic chemicals such as <a href="https://www.sciencedirect.com/topics/pharmacology-toxicology-and-pharmaceutical-science/heterocyclic-amine#:%7E:text=Heterocyclic%20amines%20are%20aromatic%20compounds,of%20reactions%20called%20Maillard%20reactions.">heterocyclic aromatic amines</a> and harmful compounds like <a href="https://www.healthline.com/nutrition/advanced-glycation-end-products">advanced glycation end products</a>, both of which have been linked to <a href="https://pubmed.ncbi.nlm.nih.gov/21709297/">insulin resistance and type 2 diabetes</a>.</p> <h2>Bye-bye barbecues and bacon butties?</h2> <p>The key message is reduction, rather than avoidance. The UK government nutritional recommendations offer sound advice: limit your combined intake of red and processed meat to no more than <a href="https://www.nhs.uk/live-well/eat-well/food-types/meat-nutrition/#:%7E:text=Red%20meat%20and%20processed%20meat&amp;text=If%20you%20currently%20eat%20more,%2C%20veal%2C%20venison%20and%20goat.">an average of 70g per day</a>.</p> <p>But these guidelines also suggest that red meat can be a valuable source of iron. So, if you decide to stop eating red meat, you should eat alternative sources of iron such as beans, lentils, dark green vegetables and fortified cereals.</p> <p>This needs to be done as part of a carefully planned diet. Non-meat sources of iron are more difficult for our bodies to absorb so should be eaten with a source of vitamin C, found in green vegetables and citrus fruit.</p> <p>The best advice to reduce your risk of developing type 2 diabetes is to maintain a healthy weight – consider losing weight if you have a higher body weight – and be as physically active as possible.</p> <p>A healthy diet should be based on plenty of vegetables, fruit, beans, peas, lentils, nuts and seeds, along with some wholegrain foods, some dairy products, fish and white meat (or vegetarian alternatives) – plus moderate amounts of red meat and minimal processed meat. This will help reduce your risk of type 2 diabetes, <a href="https://www.bhf.org.uk/informationsupport/support/healthy-living/healthy-eating">heart disease</a>, and <a href="https://www.cancerresearchuk.org/about-cancer/causes-of-cancer/diet-and-cancer/does-having-a-healthy-diet-reduce-my-risk-of-cancer">many cancers</a> – as well being more <a href="https://www.bda.uk.com/static/539e2268-7991-4d24-b9ee867c1b2808fc/a1283104-a0dd-476b-bda723452ae93870/one%20blue%20dot%20reference%20guide.pdf">environmentally sustainable</a>.</p> <p>But if you have a penchant for ham sandwiches, rest assured you can continue to indulge as an occasional treat. It’s your overall lifestyle and diet that really matter for your health and risk of developing type 2 diabetes.<!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/237346/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https://theconversation.com/republishing-guidelines --></p> <p><em><a href="https://theconversation.com/profiles/duane-mellor-136502">Duane Mellor</a>, Visiting Academic, Aston Medical School, <a href="https://theconversation.com/institutions/aston-university-1107">Aston University</a></em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/does-eating-ham-bacon-and-beef-really-increase-your-risk-of-developing-type-2-diabetes-237346">original article</a>.</em></p> </div>

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Why do dogs have different coats? Experts explain – and give grooming tips for different types

<div class="theconversation-article-body"> <p><em><a href="https://theconversation.com/profiles/susan-hazel-402495">Susan Hazel</a>, <a href="https://theconversation.com/institutions/university-of-adelaide-1119">University of Adelaide</a> and <a href="https://theconversation.com/profiles/mia-cobb-15211">Mia Cobb</a>, <a href="https://theconversation.com/institutions/the-university-of-melbourne-722">The University of Melbourne</a></em></p> <p>Dog hair comes in many varieties, from shaggy to short, curly to straight. If you live with a dog, you live with their hair – on your couch, in your clothes, it’s everywhere!</p> <p>Beyond colour, have you ever wondered what’s behind the differences in coat type?</p> <p>We actually know quite a lot about why dogs have different coats, and it comes down to their genes.</p> <h2>What are the main coat types in dogs?</h2> <p>The three main features of dog coats are how long the hairs are, whether they are curly or straight, and whether they have extra flourishes. The flourishes are called “furnishings”, and can include a hairy moustache and shaggy eyebrows.</p> <p>Combinations of these three features result in seven different coat types in dogs: short, wire, wire and curly, long, long with furnishings, curly, and curly with furnishings.</p> <p>We know from a <a href="https://www.science.org/doi/abs/10.1126/science.1177808">study of more than 1,000 dogs with varying coats</a> that differences in only three genes are responsible for this variety.</p> <p>The gene responsible for long hair (called FGF5) is <a href="https://learn.genetics.utah.edu/content/basics/patterns">recessive</a>, meaning dogs must have two copies of the mutated gene to have long hair. <a href="https://doi.org/10.1073/pnas.1402862111">In humans</a>, the same gene has been identified in families with excessively long eyelashes.</p> <p>Curly coats in dogs are related to a gene called <a href="https://www.pawprintgenetics.com/products/tests/details/173/">KRT71</a>, which affects keratin, a protein involved in hair formation. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2974189/">Mutations in this gene</a> in cats result in hairless (Sphynx) or curly-haired (Devon Rex) breeds.</p> <p>The gene responsible for furnishings (<a href="https://medlineplus.gov/genetics/gene/rspo2/">RSPO2</a>) is involved in establishing hair follicles. <a href="https://www.healthline.com/health/hair-follicle">Hair follicles</a> are small pockets in the skin that grow hair.</p> <p>Variations in these three genes could explain the coat type in most (but not all!) of the dogs tested. For example, the long coat of the Afghan hound is not explained by these three genes. Further study is needed to identify less common mutations and genes controlling the coat in these dogs.</p> <p>The earliest dog breeds would have been short-haired, as a result of the “wild-type” genes. Later changes would have arisen through mutation and deliberate selection <a href="https://theconversation.com/managing-mutations-of-a-species-the-evolution-of-dog-breeding-96635">through modern breeding practices</a>.</p> <p>If all three mutations are present, the dog has a long, curly coat with furnishings. An example is the Bichon Frisé.</p> <h2>What else varies in dog coats?</h2> <p>Dog coat types can also be single or double. In a double-coated breed such as a Labrador, there is a longer coarse layer of hairs and a softer and shorter undercoat. Wolves and ancestral dogs are single-coated, and the double coat is a result of a <a href="https://www.mdpi.com/2073-4425/10/5/323">mutation in chromosome 28</a>.</p> <p>In the Labrador, the mutation was probably selected for as they were bred to <a href="https://www.gov.nl.ca/releases/2023/exec/0525n07/">retrieve fishing nets in Canada</a>. The double coat is a great insulator and helps them to stay warm, even in icy water.</p> <h2>Why does it matter what kind of coat a dog has?</h2> <p>We know with climate change our world is going to get hotter. Dogs with a double coat are less able to tolerate heat stress, as their hair prevents heat loss.</p> <p>In a study of dogs <a href="https://onlinelibrary.wiley.com/doi/full/10.1111/avj.13296">suffering heat-related illness</a>, most of the 15 breeds at higher risk had double coats. The death rate in these dogs was 23%. We can only imagine how it must feel going out on a 40 degree day wearing a thick fur coat.</p> <p>Dogs with a double coat shed more hair than dogs with a single coat. This means even short-haired breeds, like the Labrador retriever, can shed an astonishing amount of hair. If you can’t tolerate dog hair, then a dog with a double-coat may not suit you.</p> <p>When we think of wool we think of sheep, but in the past <a href="https://www.si.edu/stories/woolly-dog-mystery-unlocked">woolly dogs were kept for their wool</a> that was <a href="https://www.science.org/doi/10.1126/science.adi6549">woven by Indigenous groups</a> and used to make blankets.</p> <p>A dog’s coat also affects how much time and effort is needed for grooming. Dogs with long or curly hair with furnishings are likely to need more time invested in their care, or visits to a professional groomer.</p> <p>Designer dogs (cross-bred dogs often crossed with a poodle, such as groodles), are likely to be curly with furnishings. In a US study, people with designer dogs reported meeting their dogs’ maintenance and grooming requirements was <a href="https://www.mdpi.com/2076-2615/12/23/3247">much harder than they expected</a>.</p> <p>It’s not just bank balances and the time needed that can suffer. If people are unable to cope with the demands of grooming long-haired dogs, lack of grooming can cause welfare problems. A study of animal cruelty cases in New York found <a href="https://www.frontiersin.org/articles/10.3389/fvets.2022.827348/full">13% involved hair matting</a>, with some hair mats causing strangulation wounds and 93% of affected dogs having long hair.</p> <h2>How can you prevent problems?</h2> <p>If you have a curly- or long-haired breed of dog, it will help to train them to like being brushed from an early age. You can do this by counter-conditioning so they have a positive emotional response to being groomed, rather than feeling anxious. First show the brush or lightly brush them, then give them a treat. They learn to associate being brushed with something positive.</p> <p>If you take your dog to the groomer, it’s very important their first experience is positive. A scary or painful incident will make it much more difficult for future grooming.</p> <p>Is your dog difficult to groom or hard to get out of the car at the groomers? It’s likely grooming is scary for them. Consulting a dog trainer or animal behaviourist who focuses on positive training methods can help a lot.</p> <p>Keeping your dog well groomed, no matter their hair type, will keep them comfortable. More important than looking great, feeling good is an essential part of dogs living their best lives with us.<!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/232480/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https://theconversation.com/republishing-guidelines --></p> <p><em><a href="https://theconversation.com/profiles/susan-hazel-402495">Susan Hazel</a>, Associate Professor, School of Animal and Veterinary Science, <a href="https://theconversation.com/institutions/university-of-adelaide-1119">University of Adelaide</a> and <a href="https://theconversation.com/profiles/mia-cobb-15211">Mia Cobb</a>, Research Fellow, Animal Welfare Science Centre, <a href="https://theconversation.com/institutions/the-university-of-melbourne-722">The University of Melbourne</a></em></p> <p><em>Image credits: Shutterstock</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/why-do-dogs-have-different-coats-experts-explain-and-give-grooming-tips-for-different-types-232480">original article</a>.</em></p> </div>

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Yes, adults can develop food allergies. Here are 4 types you need to know about

<div class="theconversation-article-body"><em><a href="https://theconversation.com/profiles/clare-collins-7316">Clare Collins</a>, <a href="https://theconversation.com/institutions/university-of-newcastle-1060">University of Newcastle</a></em></p> <p>If you didn’t have food allergies as a child, is it possible to develop them as an adult? The short answer is yes. But the reasons why are much more complicated.</p> <p>Preschoolers are about <a href="https://pubmed.ncbi.nlm.nih.gov/25316115/">four times more likely to have a food allergy</a> than adults and are more likely to grow out of it as they get older.</p> <p>It’s hard to get accurate figures on adult food allergy prevalence. The Australian National Allergy Council reports <a href="https://nationalallergycouncil.org.au/about-us/our-strategy">one in 50 adults</a> have food allergies. But a US survey suggested as many as <a href="https://pubmed.ncbi.nlm.nih.gov/30646188/">one in ten adults</a> were allergic to at least one food, with some developing allergies in adulthood.</p> <h2>What is a food allergy</h2> <p><a href="https://pubmed.ncbi.nlm.nih.gov/36509408/">Food allergies</a> are immune reactions involving <a href="https://www.aaaai.org/tools-for-the-public/allergy,-asthma-immunology-glossary/immunoglobulin-e-(ige)-defined">immunoglobulin E (IgE)</a> – an antibody that’s central to triggering allergic responses. These are known as “IgE-mediated food allergies”.</p> <p>Food allergy symptoms that are <em>not</em> mediated by IgE are usually delayed reactions and called <a href="https://pubmed.ncbi.nlm.nih.gov/25316115/">food intolerances or hypersensitivity</a>.</p> <p>Food allergy symptoms can include hives, swelling, difficulty swallowing, vomiting, throat or chest tightening, trouble breathing, chest pain, rapid heart rate, dizziness, low blood pressure or <a href="https://www.allergy.org.au/hp/papers/acute-management-of-anaphylaxis-guidelines?highlight=WyJhbmFwaHlsYXhpcyJd">anaphylaxis</a>.</p> <p>IgE-mediated food allergies can be life threatening, so all adults need an <a href="https://allergyfacts.org.au/allergy-management/newly-diagnosed/action-plan-essentials">action management plan</a> developed in consultation with their medical team.</p> <p>Here are four IgE-mediated food allergies that can occur in adults – from relatively common ones to rare allergies you’ve probably never heard of.</p> <h2>1. Single food allergies</h2> <p>The most <a href="https://pubmed.ncbi.nlm.nih.gov/30646188/">common IgE-mediated food allergies</a> in adults in a US survey were to:</p> <ul> <li>shellfish (2.9%)</li> <li>cow’s milk (1.9%)</li> <li>peanut (1.8%)</li> <li>tree nuts (1.2%)</li> <li>fin fish (0.9%) like barramundi, snapper, salmon, cod and perch.</li> </ul> <p>In these adults, about 45% reported reacting to multiple foods.</p> <p>This compares to <a href="https://pubmed.ncbi.nlm.nih.gov/25316115/">most common childhood food allergies</a>: cow’s milk, egg, peanut and soy.</p> <p>Overall, adult food allergy prevalence appears to be increasing. Compared to <a href="https://pubmed.ncbi.nlm.nih.gov/14657884/">older surveys published in 2003</a> and <a href="https://pubmed.ncbi.nlm.nih.gov/15241360/">2004</a>, peanut allergy prevalence has increased about three-fold (from 0.6%), while tree nuts and fin fish roughly doubled (from 0.5% each), with shellfish similar (2.5%).</p> <p>While new <a href="https://pubmed.ncbi.nlm.nih.gov/38214821/">adult-onset food allergies are increasing</a>, childhood-onset food allergies are also more likely to be retained into adulthood. Possible reasons for both <a href="https://pubmed.ncbi.nlm.nih.gov/38214821/">include</a> low vitamin D status, lack of immune system challenges due to being overly “clean”, heightened sensitisation due to allergen avoidance, and more frequent antibiotic use.</p> <h2>2. Tick-meat allergy</h2> <p>Tick-meat allergy, also called α-Gal syndrome or mammalian meat allergy, is an allergic reaction to galactose-alpha-1,3-galactose, or α-Gal for short.</p> <p><a href="https://pubmed.ncbi.nlm.nih.gov/33529984/">Australian immunologists first reported</a> links between α-Gal syndrome and tick bites in 2009, with cases also reported in the United States, Japan, Europe and South Africa. The <a href="https://pubmed.ncbi.nlm.nih.gov/38318181/">US Centers for Disease Control estimates</a> about 450,000 Americans <a href="https://www.cdc.gov/mmwr/volumes/72/wr/mm7230a2.htm">could be affected</a>.</p> <p>The α-Gal contains a carbohydrate molecule that is bound to a <a href="https://pubmed.ncbi.nlm.nih.gov/38318181/">protein</a> molecule in <a href="https://alphagalinformation.org/what-is-a-mammal/">mammals</a>.</p> <p>The IgE-mediated allergy is triggered after repeated bites from ticks or <a href="https://www.insectshield.com/pages/chiggers">chigger mites</a> that have bitten those mammals. When tick saliva crosses into your body through the bite, antibodies to α-Gal are produced.</p> <p>When you subsequently eat foods that contain α-Gal, the allergy is triggered. These triggering foods include meat (lamb, beef, pork, rabbit, kangaroo), dairy products (yoghurt, cheese, ice-cream, cream), <a href="https://en.wikipedia.org/wiki/Gelatin">animal-origin gelatin</a> added to gummy foods (jelly, lollies, marshmallow), prescription medications and over-the counter supplements containing gelatin (<a href="https://www.drugs.com/inactive/gelatin-57.html">some antibiotics, vitamins and other supplements</a>).</p> <p>Tick-meat allergy reactions can be hard to recognise because they’re usually delayed, and they can be severe and include anaphylaxis. Allergy <a href="https://www.allergy.org.au/patients/food-allergy/mammalian-meat-tick-faq">organisations produce management guidelines</a>, so always discuss management with your doctor.</p> <h2>3. Fruit-pollen allergy</h2> <p>Fruit-pollen allergy, called pollen food allergy syndrome, is an <a href="https://pubmed.ncbi.nlm.nih.gov/38002141/">IgE-mediated allergic reaction</a>.</p> <p>In susceptible adults, pollen in the air provokes the production of IgE antibodies to antigens in the pollen, but these antigens are similar to ones found in some fruits, vegetables and herbs. The problem is that <a href="https://pubmed.ncbi.nlm.nih.gov/38002141/">eating those plants</a> triggers an allergic reaction.</p> <p>The <a href="https://pubmed.ncbi.nlm.nih.gov/38002141/">most allergenic tree pollens</a> are from birch, cypress, Japanese cedar, <a href="https://www.betterhealth.vic.gov.au/health/conditionsandtreatments/latex-allergy">latex</a>, grass, and ragweed. Their pollen can cross-react with <a href="https://pubmed.ncbi.nlm.nih.gov/38002141/">fruit and vegetables</a>, including kiwi, banana, mango, avocado, grapes, celery, carrot and potato, and some herbs such as caraway, coriander, fennel, pepper and paprika.</p> <p>Fruit-pollen allergy is not common. Prevalence <a href="https://pubmed.ncbi.nlm.nih.gov/38002141/">estimates are between 0.03% and 8%</a> depending on the country, but it can be life-threatening. Reactions range from itching or tingling of lips, mouth, tongue and throat, called <a href="https://pubmed.ncbi.nlm.nih.gov/20306812/">oral allergy syndrome</a>, to mild <a href="https://www.allergy.org.au/patients/skin-allergy/urticaria-hives">hives</a>, to anaphylaxis.</p> <h2>4. Food-dependent, exercise-induced food allergy</h2> <p>During heavy exercise, the stomach produces less acid than usual and gut permeability increases, meaning that small molecules in your gut are more likely to escape across the membrane into your blood. These include food molecules that trigger an IgE reaction.</p> <p>If the person already has IgE antibodies to the foods eaten before exercise, then the risk of triggering food allergy reactions is increased. This allergy is called <a href="https://pubmed.ncbi.nlm.nih.gov/37893663/">food-dependent exercise-induced allergy</a>, with symptoms ranging from hives and swelling, to difficulty breathing and anaphylaxis.</p> <p><a href="https://pubmed.ncbi.nlm.nih.gov/30601082/">Common trigger foods include</a> wheat, seafood, meat, poultry, egg, milk, nuts, grapes, celery and other foods, which could have been eaten many hours before exercising.</p> <p>To complicate things even further, allergic <a href="https://pubmed.ncbi.nlm.nih.gov/33181008/">reactions can</a> occur at lower levels of trigger-food exposure, and be more severe if the person is simultaneously taking non-steroidal inflammatory medications like aspirin, drinking alcohol or is sleep-deprived.</p> <p>Food-dependent exercise-induced allergy is extremely rare. Surveys have estimated prevalence as between <a href="https://www.sciencedirect.com/science/article/pii/S1555415517300259">one to 17 cases per 1,000 people worldwide</a> with the highest prevalence between the teenage years to age 35. Those affected often have other allergic conditions such as hay fever, asthma, allergic conjunctivitis and dermatitis.</p> <h2>Allergies are a growing burden</h2> <p>The <a href="https://pubmed.ncbi.nlm.nih.gov/36509408/">burden on physical health, psychological health</a> and health costs due to food allergy is increasing. In the US, this <a href="https://pubmed.ncbi.nlm.nih.gov/38393624/">financial burden was estimated as $24 billion per year</a>.</p> <p>Adult food allergy needs to be taken seriously and those with severe symptoms should wear a medical information bracelet or chain and carry an <a href="https://www.healthdirect.gov.au/how-to-use-an-adrenaline-autoinjector-epipen-anapen">adrenaline auto-injector pen</a>. Concerningly, surveys suggest only <a href="https://pubmed.ncbi.nlm.nih.gov/30646188/">about one in four adults</a> with food allergy have an adrenaline pen.</p> <p>If you have an IgE-mediated food allergy, discuss your management plan with your doctor. You can also find more information at <a href="https://allergyfacts.org.au/">Allergy and Anaphylaxis Australia</a>.<!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/223342/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https://theconversation.com/republishing-guidelines --></p> <p><a href="https://theconversation.com/profiles/clare-collins-7316"><em>Clare Collins</em></a><em>, Laureate Professor in Nutrition and Dietetics, <a href="https://theconversation.com/institutions/university-of-newcastle-1060">University of Newcastle</a></em></p> <p><em>Image credits: Getty Images </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/yes-adults-can-develop-food-allergies-here-are-4-types-you-need-to-know-about-223342">original article</a>.</em></p> </div>

Body

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Could not getting enough sleep increase your risk of type 2 diabetes?

<div class="theconversation-article-body"> <p><em><a href="https://theconversation.com/profiles/giuliana-murfet-1517219">Giuliana Murfet</a>, <a href="https://theconversation.com/institutions/university-of-technology-sydney-936">University of Technology Sydney</a> and <a href="https://theconversation.com/profiles/shanshan-lin-1005236">ShanShan Lin</a>, <a href="https://theconversation.com/institutions/university-of-technology-sydney-936"><em>University of Technology Sydney</em></a></em></p> <p>Not getting enough sleep is a common affliction in the modern age. If you don’t always get as many hours of shut-eye as you’d like, perhaps you were concerned by news of a <a href="https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2815684">recent study</a> that found people who sleep less than six hours a night are at higher risk of type 2 diabetes.</p> <p>So what can we make of these findings? It turns out the relationship between sleep and diabetes is complex.</p> <h2>The study</h2> <p>Researchers analysed data from the <a href="https://www.ukbiobank.ac.uk/">UK Biobank</a>, a large biomedical database which serves as a global resource for health and medical research. They looked at information from 247,867 adults, following their health outcomes for more than a decade.</p> <p>The researchers wanted to understand the associations between sleep duration and type 2 diabetes, and whether a healthy diet reduced the effects of short sleep on diabetes risk.</p> <p>As part of their involvement in the UK Biobank, participants had been asked roughly how much sleep they get in 24 hours. Seven to eight hours was the average and considered normal sleep. Short sleep duration was broken up into three categories: mild (six hours), moderate (five hours) and extreme (three to four hours). The researchers analysed sleep data alongside information about people’s diets.</p> <p>Some 3.2% of participants were diagnosed with type 2 diabetes during the follow-up period. Although healthy eating habits were associated with a lower overall risk of diabetes, when people ate healthily but slept less than six hours a day, their risk of type 2 diabetes increased compared to people in the normal sleep category.</p> <p>The researchers found sleep duration of five hours was linked with a 16% higher risk of developing type 2 diabetes, while the risk for people who slept three to four hours was 41% higher, compared to people who slept seven to eight hours.</p> <p>One limitation is the study defined a healthy diet based on the number of servings of fruit, vegetables, red meat and fish a person consumed over a day or a week. In doing so, it didn’t consider how dietary patterns such as time-restricted eating or the Mediterranean diet may modify the risk of diabetes among those who slept less.</p> <p>Also, information on participants’ sleep quantity and diet was only captured at recruitment and may have changed over the course of the study. The authors acknowledge these limitations.</p> <h2>Why might short sleep increase diabetes risk?</h2> <p>In people with <a href="https://www.diabetesaustralia.com.au/about-diabetes/type-2-diabetes/">type 2 diabetes</a>, the body becomes resistant to the effects of a hormone called insulin, and slowly loses the capacity to produce enough of it in the pancreas. Insulin is important because it regulates glucose (sugar) in our blood that comes from the food we eat by helping move it to cells throughout the body.</p> <p>We don’t know the precise reasons why people who sleep less may be at higher risk of type 2 diabetes. But <a href="https://doi.org/10.7759/cureus.23501">previous research</a> has shown sleep-deprived people often have increased <a href="https://doi.org/10.1186/1476-511X-9-125">inflammatory markers</a> and <a href="https://doi.org/10.1007/s00125-015-3500-4">free fatty acids</a> in their blood, which <a href="https://doi.org/10.1007/s11892-018-1055-8">impair insulin sensitivity</a>, leading to <a href="https://doi.org/10.7759/cureus.23501">insulin resistance</a>. This means the body struggles to use insulin properly to regulate blood glucose levels, and therefore increases the risk of type 2 diabetes.</p> <p>Further, people who don’t sleep enough, as well as people who sleep in irregular patterns (such as shift workers), experience disruptions to their body’s natural rhythm, known as the <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5995632/">circadian rhythm</a>.</p> <p>This can interfere with the release of hormones like <a href="https://doi.org/10.1210/edrv.18.5.0317">cortisol, glucagon and growth hormones</a>. These hormones are released through the day to meet the body’s changing energy needs, and normally keep blood glucose levels nicely balanced. If they’re compromised, this may reduce the body’s ability to handle glucose as the day progresses.</p> <p>These factors, and <a href="https://www.science.org/doi/10.1126/sciadv.aar8590">others</a>, may contribute to the increased risk of type 2 diabetes seen among people sleeping less than six hours.</p> <p>While this study primarily focused on people who sleep eight hours or less, it’s possible longer sleepers may also face an increased risk of type 2 diabetes.</p> <p>Research has previously shown a U-shaped correlation between sleep duration and type 2 diabetes risk. A <a href="https://doi.org/10.2337/dc14-2073">review</a> of multiple studies found getting between seven to eight hours of sleep daily was associated with the lowest risk. When people got less than seven hours sleep, or more than eight hours, the risk began to increase.</p> <p>The reason sleeping longer is associated with increased risk of type 2 diabetes may be linked to <a href="https://doi.org/10.2337/dc15-0186">weight gain</a>, which is also correlated with longer sleep. Likewise, people who don’t sleep enough are more likely to be <a href="https://doi.org/10.1016/j.sleh.2017.07.013">overweight or obese</a>.</p> <h2>Good sleep, healthy diet</h2> <p>Getting enough sleep is an important part of a healthy lifestyle and may reduce the risk of type 2 diabetes.</p> <p>Based on this study and other evidence, it seems that when it comes to diabetes risk, seven to eight hours of sleep may be the sweet spot. However, other factors could influence the relationship between sleep duration and diabetes risk, such as individual differences in sleep quality and lifestyle.</p> <p>While this study’s findings question whether a healthy diet can mitigate the effects of a lack of sleep on diabetes risk, a wide range of evidence points to the benefits of <a href="https://www.who.int/initiatives/behealthy/healthy-diet">healthy eating</a> for overall health.</p> <p>The <a href="https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2815684">authors of the study</a> acknowledge it’s not always possible to get enough sleep, and suggest doing <a href="https://pubmed.ncbi.nlm.nih.gov/33137489/">high-intensity interval exercise</a> during the day may offset some of the potential effects of short sleep on diabetes risk.</p> <p>In fact, exercise <a href="https://doi.org/10.1016/j.jshs.2023.03.001">at any intensity</a> can improve blood glucose levels.<!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/225179/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https://theconversation.com/republishing-guidelines --></p> <p><em><a href="https://theconversation.com/profiles/giuliana-murfet-1517219">Giuliana Murfet</a>, Casual Academic, Faculty of Health, <a href="https://theconversation.com/institutions/university-of-technology-sydney-936">University of Technology Sydney</a> and <a href="https://theconversation.com/profiles/shanshan-lin-1005236">ShanShan Lin</a>, Senior Lecturer, School of Public Health, <a href="https://theconversation.com/institutions/university-of-technology-sydney-936">University of Technology Sydney</a></em></p> <p><em>Image credits: Getty Images</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/could-not-getting-enough-sleep-increase-your-risk-of-type-2-diabetes-225179">original article</a>.</em></p> </div>

Body

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Centenarian blood tests give hints of the secrets to longevity

<p><em><a href="https://theconversation.com/profiles/karin-modig-1473484">Karin Modig</a>, <a href="https://theconversation.com/institutions/karolinska-institutet-1250">Karolinska Institutet</a></em></p> <p>Centenarians, once considered rare, have become commonplace. Indeed, they are the <a href="https://www.weforum.org/agenda/2021/02/living-to-one-hundred-life-expectancy/">fastest-growing demographic group</a> of the world’s population, with numbers roughly doubling every ten years since the 1970s.</p> <p>How long humans can live, and what determines a long and healthy life, have been of interest for as long as we know. Plato and Aristotle discussed and <a href="https://pubmed.ncbi.nlm.nih.gov/12092789/">wrote about the ageing process</a> over 2,300 years ago.</p> <p>The pursuit of understanding the secrets behind exceptional longevity isn’t easy, however. It involves <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7105197/">unravelling the complex interplay</a> of genetic predisposition and lifestyle factors and how they interact throughout a person’s life. Now our recent study, <a href="https://link.springer.com/article/10.1007/s11357-023-00936-w">published in GeroScience</a>, has unveiled some common biomarkers, including levels of cholesterol and glucose, in people who live past 90.</p> <p>Nonagenarians and centenarians have long been of intense interest to scientists as they may help us understand how to live longer, and perhaps also how to age in better health. So far, studies of centenarians have often been small scale and focused on a selected group, for example, excluding centenarians who live in care homes.</p> <h2>Huge dataset</h2> <p>Ours is the largest study comparing biomarker profiles measured throughout life among exceptionally long-lived people and their shorter-lived peers to date.</p> <p>We compared the biomarker profiles of people who went on to live past the age of 100, and their shorter-lived peers, and investigated the link between the profiles and the chance of becoming a centenarian.</p> <p>Our research included data from 44,000 Swedes who underwent health assessments at ages 64-99 - they were a sample of <a href="https://pubmed.ncbi.nlm.nih.gov/28158674/">the so-called Amoris cohort</a>. These participants were then followed through Swedish register data for up to 35 years. Of these people, 1,224, or 2.7%, lived to be 100 years old. The vast majority (85%) of the centenarians were female.</p> <p>Twelve blood-based biomarkers related to inflammation, metabolism, liver and kidney function, as well as potential malnutrition and anaemia, were included. All of these <a href="https://www.nature.com/articles/s41591-019-0719-5">have been associated</a> with ageing or mortality in previous studies.</p> <p>The biomarker related to inflammation was uric acid – a waste product in the body caused by the digestion of certain foods. We also looked at markers linked to metabolic status and function including total cholesterol and glucose, and ones related to liver function, such as alanine aminotransferase (Alat), aspartate aminotransferase (Asat), albumin, gamma-glutamyl transferase (GGT), alkaline phosphatase (Alp) and lactate dehydrogenase (LD).</p> <p>We also looked at creatinine, which is linked to kidney function, and iron and total iron-binding capacity (TIBC), which is linked to anaemia. Finally, we also investigated albumin, a biomarker associated with nutrition.</p> <h2>Findings</h2> <p>We found that, on the whole, those who made it to their hundredth birthday tended to have lower levels of glucose, creatinine and uric acid from their sixties onwards. Although the median values didn’t differ significantly between centenarians and non-centenarians for most biomarkers, centenarians seldom displayed extremely high or low values.</p> <p>For example, very few of the centenarians had a glucose level above 6.5 earlier in life, or a creatinine level above 125.</p> <p>For many of the biomarkers, both centenarians and non-centenarians had values outside of the range considered normal in clinical guidelines. This is probably because these guidelines are set based on a younger and healthier population.</p> <p>When exploring which biomarkers were linked to the likelihood of reaching 100, we found that all but two (alat and albumin) of the 12 biomarkers showed a connection to the likelihood of turning 100. This was even after accounting for age, sex and disease burden.</p> <p>The people in the lowest out of five groups for levels of total cholesterol and iron had a lower chance of reaching 100 years as compared to those with higher levels. Meanwhile, people with higher levels of glucose, creatinine, uric acid and markers for liver function also decreased the chance of becoming a centenarian.</p> <p>In absolute terms, the differences were rather small for some of the biomarkers, while for others the differences were somewhat more substantial.</p> <p>For uric acid, for instance, the absolute difference was 2.5 percentage points. This means that people in the group with the lowest uric acid had a 4% chance of turning 100 while in the group with the highest uric acid levels only 1.5% made it to age 100.</p> <p>Even if the differences we discovered were overall rather small, they suggest a potential link between metabolic health, nutrition and exceptional longevity.</p> <p>The study, however, does not allow any conclusions about which lifestyle factors or genes are responsible for the biomarker values. However, it is reasonable to think that factors such as nutrition and alcohol intake play a role. Keeping track of your kidney and liver values, as well as glucose and uric acid as you get older, is probably not a bad idea.</p> <p>That said, chance probably plays a role at some point in reaching an exceptional age. But the fact that differences in biomarkers could be observed a long time before death suggests that genes and lifestyle may also play a role.<!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/215166/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https://theconversation.com/republishing-guidelines --></p> <p><em><a href="https://theconversation.com/profiles/karin-modig-1473484">Karin Modig</a>, Associate Professor, Epidemiology, <a href="https://theconversation.com/institutions/karolinska-institutet-1250">Karolinska Institutet</a></em></p> <p><em>Image credits: Shutterstock</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/centenarian-blood-tests-give-hints-of-the-secrets-to-longevity-215166">original article</a>.</em></p>

Retirement Life

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The types of insurance that aren’t worth your while

<p>While it’s important to make sure you’ve been covered, some forms of insurance aren’t really worth your while in the long run. We’ve taken a look at several types of insurance you shouldn’t really bother with, why they’re not worth your money and how you can find an alternative.</p> <p>Yes, it’s essential to make sure you’re covered, but at the same time you don’t need to waste any money.</p> <p><strong>Extended warranties</strong></p> <p>Many a salesperson has made a customer fork out that little bit extra for an “extended warranty” to go with a major electronic purchase. The thing is though, in many cases the period of time covered by the warranty is actually exactly the level you’re automatically entitled to under consumer law.</p> <p><strong>Credit protection insurance</strong></p> <p>While this type of insurance can be useful and a way to insure yourself against the possibility of something happening to your income as the result of an injury or a condition, credit protection insurance has tendency to be pretty expensive.</p> <p>A more cost effective way to ensure your payments to your credit card, personal loans or mortgages are fulfilled would be to take out a life insurance or total and permanent disability insurance policy through your individual superannuation fund.</p> <p><strong>Funeral insurance</strong></p> <p>Many people see this as a good way to ease the financial burden on their family that comes with their passing, but in reality funeral insurance is quite expensive and the premiums add up every year.</p> <p>A far better option is a prepaid funeral, funeral bonds life insurance or even a special savings account with money set aside. Just make sure you let your family know!</p> <p><strong>ID theft insurance</strong></p> <p>This is one of those types of insurance that isn’t really protecting your from becoming a victim, rather helping you deal with the costs once it’s already happened. And what’s more, you bank is usually willing to cover the costs of credit card fraud, which is one of the major problems to be associated with ID theft.</p> <p>Instead of spending money on a policy you can protect yourself from ID theft by simply keeping your personal documents safe, shredding documents such as bank account statements before throwing them away, and using antivirus software that is up to date. You can also check your credit file each year to make sure nobody’s using your identity for fake accounts.</p> <p><em>Image credits: Getty Images </em></p>

Money & Banking

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8 reasons everyone should know their blood type

<p><strong>Why you should know your blood type</strong></p> <p>What’s in a blood type? Potentially a lot, according to research, including a review of studies published in the Wiley Interdisciplinary Reviews: Systems Biology and Medicine, that connects different blood groups to everything from risk of heart disease and dementia to urinary tract infections and the norovirus.</p> <p>While none of the studies are conclusive about cause and effect (they can’t say X blood type causes Y disease) and any increased risks are still pretty small, the research does highlight the importance of knowing your type – A, B, AB, or O – and how it could affect your wellbeing.</p> <p><strong>Blood clots: Type AB, A, and B increases risk</strong></p> <p>Danish researchers studied how blood type interacts with a genetic predisposition for deep-vein thrombosis (DVT), or blood clots in the lower legs that can travel to the lungs and become life-threatening. After analysing data on about 66,000 people over more than 30 years, they found that those with type AB, A, or B had a 40 per cent higher risk of DVT than people with type O, the most common type.</p> <p>When the scientists did further analysis to see which factors have the biggest impact on DVT risk on a population level, they found that an AB blood type contributed to about 20 per cent of blood clots; genetic mutations accounted for 11 per cent, being overweight accounted for 16 per cent, and smoking accounted for six per cent.</p> <p><strong>Heart disease: Type AB, B, and A all increase risk </strong></p> <p>People whose blood type is A, B, or AB have an increased risk of heart disease and shorter life spans than people who have type O blood, according to a large study published in BMC Medicine. After following more than 50,000 middle-age and elderly people for seven years, on average, researchers found that as many as nine per cent of cardiovascular deaths were attributed to having non-O blood types.</p> <p>However, as any doctor will tell you, lifestyle factors like weight, smoking and diet, which, unlike blood type, are modifiable, have a much greater impact on heart disease.</p> <p><strong>Stomach cancer: Types A and AB increases risk </strong></p> <p>Researchers have known for a while that people with blood type A are at risk for stomach cancer. But research published in BMC Cancer shows that people with blood type AB are also at risk. Using genetic data from a large number of cases and controls, researchers found a link between both blood types and gastric cancer in Chinese populations. A review of 39 previous studies confirmed their findings.</p> <p><strong>Fertility: Type O reduces it </strong></p> <p>Women with this blood type were twice as likely to have blood levels of the hormone FSH high enough to indicate low ovarian reserve, a measure of fertility, according to a study published in Human Reproduction. Researchers couldn’t say for sure why, though. Given that type O blood is the most prevalent, it doesn’t pay to worry too much about it. Age is a far more important risk factor for fertility problems.</p> <p><strong>Pregnancy risks </strong></p> <p>This has nothing to do with your “letter” blood type or the type determined by the ABO grouping system. This has to do with what’s known as the Rhesus (Rh) factor, which determines whether your blood type is positive or negative. This could cause complications in pregnant women if the baby’s Rh blood type is different from the mother’s.</p> <p>For instance, if the mother has a negative blood type and the baby has a positive one, the mother’s body can actually build up antibodies against the baby’s blood type. Luckily, this doesn’t affect the baby, but it could have a negative effect on future pregnancies. Fortunately, doctors can give pregnant women a shot early in their pregnancy that can prevent Rh-incompatibility problems.</p> <p><strong>Dementia and memory loss: Type AB increases risk </strong></p> <p>People with type AB blood have an 82 per cent greater risk for cognitive decline later in life, according to a study published in Neurology. That’s likely because they have larger amounts of what’s known as the Factor VIII protein, which helps with blood clotting.</p> <p>Study participants with higher levels of this protein were 24 per cent more likely to develop memory problems – regardless of their blood type – than people with lower levels. Blood type, however, is far from the only, or even most important, factor that affects your risk for cognitive decline.</p> <p><strong>Stroke: Type O has the lowest risk</strong></p> <p>People with a blood type other than O (the most common) have a higher risk of cardiovascular issues such as stroke, according to a study published in the Journal of Thrombosis and Haemostasis. Biologists are still investigating why this might be; one possible explanation is that non-O blood types contain more of the Von Willebrand factor, a protein that has been connected to blood clotting and stroke in the past.</p> <p><strong>Mosquitos like Type O blood </strong></p> <p>If you find yourself scratching bug bites all summer long, your blood type might be to blame. In a one small study, researchers found that type Os are up to twice as attractive to mosquitoes as type As, with type Bs falling somewhere in the middle. </p> <p><em>Image credits: Shutterstock</em></p> <p style="box-sizing: border-box; border: 0px; margin: 0px 0px 20px; outline: 0px; padding: 0px; vertical-align: baseline; line-height: 26px;"><em>This article originally appeared on <a href="https://www.readersdigest.com.au/healthsmart/8-reasons-everyone-should-know-their-blood-type" target="_blank" rel="noopener">Reader's Digest</a>. </em></p>

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"I've lost complete blood flow": Robert Irwin's near miss with python

<p>Young wildlife warrior Robert Irwin suffered a near miss during a rescue mission over the weekend, when he tried to relocate a carpet python off the road. </p> <p>The 19-year-old took to Instagram on Sunday to share a video of him almost getting bit by the wild snake. </p> <p>"Gee, that gets the heart rate up - he missed me by that much," he said when the snake struck at him. </p> <p>"He's grumpy... he's really keen on biting me... what a gorgeous snake, he's big, he's not venomous but... they're designed to constrict," he said as the python began wrapping its body around his arm to ''constrict" him. </p> <p>"He's got a good grip there, I've lost complete blood flow to my hand, it's completely blue.. and I have no feeling left in my hand," he added. </p> <p>He eventually managed to rescue the snake, and relocated it to a safe spot in the bush the day after. </p> <p>"Near miss! Definitely had a good laugh with this grumpy carpet python - but great to get him rescued off the road and relocated to a much safer spot!" he captioned the post. </p> <blockquote class="instagram-media" style="background: #FFF; border: 0; border-radius: 3px; box-shadow: 0 0 1px 0 rgba(0,0,0,0.5),0 1px 10px 0 rgba(0,0,0,0.15); margin: 1px; max-width: 540px; min-width: 326px; padding: 0; width: calc(100% - 2px);" data-instgrm-captioned="" data-instgrm-permalink="https://www.instagram.com/reel/C0Fc3k-hiy9/?utm_source=ig_embed&amp;utm_campaign=loading" data-instgrm-version="14"> <div style="padding: 16px;"> <div style="display: flex; flex-direction: row; align-items: center;"> <div style="background-color: #f4f4f4; border-radius: 50%; flex-grow: 0; height: 40px; margin-right: 14px; width: 40px;"> </div> <div style="display: flex; flex-direction: column; flex-grow: 1; justify-content: center;"> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; margin-bottom: 6px; width: 100px;"> </div> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; width: 60px;"> </div> </div> </div> <div style="padding: 19% 0;"> </div> <div style="display: block; height: 50px; margin: 0 auto 12px; width: 50px;"> </div> <div style="padding-top: 8px;"> <div style="color: #3897f0; font-family: Arial,sans-serif; font-size: 14px; font-style: normal; font-weight: 550; line-height: 18px;">View this post on Instagram</div> </div> <div style="padding: 12.5% 0;"> </div> <div style="display: flex; flex-direction: row; margin-bottom: 14px; align-items: center;"> <div> <div style="background-color: #f4f4f4; border-radius: 50%; height: 12.5px; width: 12.5px; transform: translateX(0px) translateY(7px);"> </div> <div style="background-color: #f4f4f4; height: 12.5px; transform: rotate(-45deg) translateX(3px) translateY(1px); width: 12.5px; flex-grow: 0; margin-right: 14px; margin-left: 2px;"> </div> <div style="background-color: #f4f4f4; border-radius: 50%; height: 12.5px; width: 12.5px; transform: translateX(9px) translateY(-18px);"> </div> </div> <div style="margin-left: 8px;"> <div style="background-color: #f4f4f4; border-radius: 50%; flex-grow: 0; height: 20px; width: 20px;"> </div> <div style="width: 0; height: 0; border-top: 2px solid transparent; border-left: 6px solid #f4f4f4; border-bottom: 2px solid transparent; transform: translateX(16px) translateY(-4px) rotate(30deg);"> </div> </div> <div style="margin-left: auto;"> <div style="width: 0px; border-top: 8px solid #F4F4F4; border-right: 8px solid transparent; transform: translateY(16px);"> </div> <div style="background-color: #f4f4f4; flex-grow: 0; height: 12px; width: 16px; transform: translateY(-4px);"> </div> <div style="width: 0; height: 0; border-top: 8px solid #F4F4F4; border-left: 8px solid transparent; transform: translateY(-4px) translateX(8px);"> </div> </div> </div> <div style="display: flex; flex-direction: column; flex-grow: 1; justify-content: center; margin-bottom: 24px;"> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; margin-bottom: 6px; width: 224px;"> </div> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; width: 144px;"> </div> </div> <p style="color: #c9c8cd; font-family: Arial,sans-serif; font-size: 14px; line-height: 17px; margin-bottom: 0; margin-top: 8px; overflow: hidden; padding: 8px 0 7px; text-align: center; text-overflow: ellipsis; white-space: nowrap;"><a style="color: #c9c8cd; font-family: Arial,sans-serif; font-size: 14px; font-style: normal; font-weight: normal; line-height: 17px; text-decoration: none;" href="https://www.instagram.com/reel/C0Fc3k-hiy9/?utm_source=ig_embed&amp;utm_campaign=loading" target="_blank" rel="noopener">A post shared by Robert Irwin (@robertirwinphotography)</a></p> </div> </blockquote> <p>Fans shared their shock and couldn't help but comment on how much the young conservationist was like his late father, Steve Irwin. </p> <p>"Dude you are killing us with these like-father-like-son bits,"  one fan wrote. </p> <p>"Holy crap. I actually thought I was watching Steve for a second and it took me back a moment. He's very much still alive in his family. No doubt about that," another added. </p> <p>"This is precarious yet hiss-terical !😂 all at the same time. Thank you for helping snakey dude slither to safety! 👍🏼💕" added a fellow conservationist. </p> <p><em>Images: Instagram</em></p>

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Worried about getting a blood test? 5 tips to make them easier (and still accurate)

<p><em><a href="https://theconversation.com/profiles/sapha-shibeeb-1481231">Sapha Shibeeb</a>, <a href="https://theconversation.com/institutions/rmit-university-1063">RMIT University</a></em></p> <p>Blood tests are a common medical procedure, offering valuable insights into a person’s health. Whether you’re getting a routine check-up, diagnosing a medical condition or monitoring treatment progress, understanding the process can make the experience more comfortable and effective.</p> <p>For the majority of patients, blood collections are a minor inconvenience. Others may feel <a href="https://www.sciencedirect.com/science/article/abs/pii/S0887618506000041">uneasy and anxious</a>.</p> <p>Preparation strategies can help get you through the procedure.</p> <h2>How blood is collected</h2> <p>During venipuncture (blood draw), the phlebotomist (blood collector) inserts a needle through the skin into a vein and a small amount of blood is collected and transferred into a test tube.</p> <p>Tubes are sent to a laboratory, where the blood is analysed. A laboratory technician may count or examine cells and measure the levels of minerals/salts, enzymes, proteins or other substances in the sample. For some tests, blood plasma is separated out by spinning (centrifuging) the sample. Others pass a light beam through the sample to determine the amount of a chemical present.</p> <p>For collection, the phlebotomist usually selects a vein in the crook of your elbow, where veins are readily accessible. Blood can also be drawn from veins in the wrists, fingers or heels. A tourniquet may be applied to restrict blood flow and make the chosen vein puff out.</p> <h2>Different tests require different preparation</h2> <p>Before a blood test, the GP or health-care provider will give you specific instructions.</p> <p>These may include fasting for up to 12 hours or temporarily discontinuing certain medications.</p> <p>It is crucial to follow these guidelines meticulously as they can significantly impact the accuracy of your test results. For example, fasting is required before glucose (blood sugar) and lipids (blood fats) testing because blood sugar and cholesterol levels typically increase after a meal.</p> <p>If the blood test requires fasting, you will be asked not to eat or drink (no tea, coffee, juice or alcohol) for about eight to 12 hours. Water is allowed but smoking should be avoided because it can increase <a href="https://diabetesjournals.org/care/article/19/2/112/19825/Acute-Effect-of-Cigarette-Smoking-on-Glucose">blood sugar, cholesterol and triglyceride levels</a>.</p> <p>Generally, you will be asked to fast overnight and have the blood collection done in the morning. Fasting for longer than 15 hours could impact your results, too, by causing dehydration or the release of certain chemicals in the blood.</p> <p>If you have diabetes, you must consult your doctor prior to fasting because it can increase the risk of hypoglycemia (low blood sugar) in people with type 1 diabetes. Most type 2 diabetics can safely fast before a blood test but there are some exceptions, such as people who are taking certain medications including insulin.</p> <h2>5 tips for a better blood test</h2> <p>To improve your blood collection experience, consider these tips:</p> <p><strong>1. Hydrate</strong></p> <p>Drink plenty of water right up to 30 minutes before your appointment. Adequate hydration improves blood flow, making your veins more accessible. Avoid <a href="https://academic.oup.com/labmed/article/34/10/736/2657269">strenuous exercise</a> before your blood test, which can increase some blood parameters (such as liver function) while decreasing others (such as sodium).</p> <p><strong>2. Loose clothing</strong></p> <p>Wear clothing that allows easy access to your arms to ensure a less stressful procedure.</p> <p><strong>3. Manage anxiety</strong></p> <p>If the sight of blood or the procedure makes you anxious, look away while the needle is inserted and try to keep breathing normally. Distraction can help – virtual reality has been <a href="https://pubmed.ncbi.nlm.nih.gov/31889358/">trialled</a> to reduce needle anxiety in children. You could try bringing something to read or music to listen to.</p> <p><strong>4. Know your risk of fainting</strong></p> <p>If you’re prone to fainting, make sure to inform the phlebotomist when you arrive. You can have your blood drawn while lying down to minimise the risk of passing out and injury. Hydration helps maintain blood pressure and can also <a href="https://www.ahajournals.org/doi/10.1161/01.CIR.0000101966.24899.CB">reduce the risk</a> of fainting.</p> <p><strong>5. Discuss difficult veins</strong></p> <p>Some people have smaller or scarred veins, often due to repeated punctures, <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4989034/">chemotherapy</a> or blood thinner use. In such cases, venipuncture may require multiple attempts. It is important to talk to the phlebotomist if you feel discomfort or significant pain. A finger prick can be performed as an alternative for some tests, such as blood glucose levels. But other comprehensive tests require larger blood volume.</p> <h2>Blood draws after lymph node removal</h2> <p>Historically, there were concerns about drawing blood from an arm that had undergone lymph node removal. This was due to the risk of <a href="https://www.cancer.gov/about-cancer/treatment/side-effects/lymphedema/lymphedema-pdq#:%7E:text=Lymphedema%20is%20the%20build%2Dup,the%20way%20that%20it%20should.">lymphedema</a>, a condition marked by fluid build-up in the affected arm. Lymph nodes may have been removed (<a href="https://www.ncbi.nlm.nih.gov/books/NBK564397/#:%7E:text=Lymph%20node%20dissection%2C%20also%20known,surgical%20management%20of%20malignant%20tumors.">lymphadenectomy</a>) for cancer diagnosis or treatment.</p> <p>However, a <a href="https://ascopubs.org/doi/10.1200/JCO.2015.61.5948">2016 study</a> showed people who’ve had lymph nodes removed are not at a higher risk of developing lymphedema following blood draws, even when drawing blood from the affected arm.</p> <h2>After your blood test</h2> <p>The whole blood test procedure usually lasts no more than a few minutes. Afterwards, you may be asked to apply gentle pressure over a clean dressing to aid clotting and reduce swelling.</p> <p>If you do experience swelling, bruising or pain after a test, follow general first aid procedures to alleviate discomfort. These include applying ice to the site, resting the affected arm and, if needed, taking a pain killer.</p> <p>It is usually recommended you do not do heavy lifting for a few hours after a blood draw. This is to prevent surges in blood flow that could prevent clotting where the blood was taken.<!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/216073/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https://theconversation.com/republishing-guidelines --></p> <p><em><a href="https://theconversation.com/profiles/sapha-shibeeb-1481231">Sapha Shibeeb</a>, Senior lecturer in Laboratory Medicine , <a href="https://theconversation.com/institutions/rmit-university-1063">RMIT University</a></em></p> <p><em>Image credits: Shutterstock</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/worried-about-getting-a-blood-test-5-tips-to-make-them-easier-and-still-accurate-216073">original article</a>.</em></p>

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We found 3 types of food wasters, which one are you?

<p><em><a href="https://theconversation.com/profiles/trang-nguyen-1454838">Trang Nguyen</a>, <a href="https://theconversation.com/institutions/university-of-adelaide-1119">University of Adelaide</a> and <a href="https://theconversation.com/profiles/patrick-oconnor-109973">Patrick O'Connor</a>, <a href="https://theconversation.com/institutions/university-of-adelaide-1119">University of Adelaide</a></em></p> <p>Each year, Australian households discard about <a href="https://workdrive.zohopublic.com.au/external/06152b9ff5971843391f39fc4d32a847e56fb907c167a4a645887b0a4bc43000">2.5 million tonnes of food</a>. Most (73%) of this food waste <a href="https://www.sciencedirect.com/science/article/pii/S0959652622042081">ends up in landfill</a>.</p> <p>This is costly and contributes to <a href="https://pubmed.ncbi.nlm.nih.gov/37118273/">escalating greenhouse gas emissions</a>, because food waste rotting in landfill produces methane. So reducing household food waste and diverting it from landfill saves money, improves food security and benefits the environment.</p> <p>To address the problem, we need to understand how people generate and dispose of food waste. In <a href="https://doi.org/10.1016/j.foodqual.2023.105000">our new study</a>, we found households fell into three categories – based on the amount of food wasted, how much of that waste was avoidable and how it was sorted. These insights into consumer behaviour point to where the most worthwhile improvements can be made.</p> <figure><iframe src="https://www.youtube.com/embed/JvAFaD5f1Lo?wmode=transparent&amp;start=0" width="440" height="260" frameborder="0" allowfullscreen="allowfullscreen"></iframe><figcaption></figcaption></figure> <h2>Three types of households</h2> <p>We conducted an online survey of 939 households in metropolitan Adelaide between April and May 2021.</p> <p>The sample closely matched the national Australian population in terms of gender, age and income.</p> <p>We asked about the types of food waste produced, the amount of food waste typically discarded in a week and motivations towards reducing and sorting food waste.</p> <p>We identified three distinct types of households:</p> <p><strong>Warriors</strong> are typically older and highly motivated to reduce and sort food waste. They generate minimal waste (9.6 litres per week), such as bones and vegetable peels, that is mostly unavoidable. This group comprised 39.6% of the sample.</p> <p><strong>Strugglers</strong> mainly consist of families with children who produce the largest amount of food waste (33.1 litres per week). They produce the highest proportion of avoidable food waste, such as uneaten fruits and vegetables, bread and cereals. They are moderately motivated to reduce and sort food waste, but more than half of their food waste still ends up in landfill. This group made up 19.6% of the sample.</p> <p><strong>Slackers</strong> are generally younger. They show little concern about reducing or sorting food waste. Slackers produce the smallest amount of food waste overall (9 litres a week), but the proportion of avoidable food waste (such as mixed leftovers) is significantly higher (38.9%) compared to warriors (24.5%). They are more than twice as likely to live in units, with 17.2% doing so, compared to just 7.8% of warriors. This group was 40.8% of the sample.</p> <figure class="align-center zoomable"><a href="https://images.theconversation.com/files/550951/original/file-20230928-27-f7cw8e.png?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=1000&amp;fit=clip"><img src="https://images.theconversation.com/files/550951/original/file-20230928-27-f7cw8e.png?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px" srcset="https://images.theconversation.com/files/550951/original/file-20230928-27-f7cw8e.png?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=600&amp;h=361&amp;fit=crop&amp;dpr=1 600w, https://images.theconversation.com/files/550951/original/file-20230928-27-f7cw8e.png?ixlib=rb-1.1.0&amp;q=30&amp;auto=format&amp;w=600&amp;h=361&amp;fit=crop&amp;dpr=2 1200w, https://images.theconversation.com/files/550951/original/file-20230928-27-f7cw8e.png?ixlib=rb-1.1.0&amp;q=15&amp;auto=format&amp;w=600&amp;h=361&amp;fit=crop&amp;dpr=3 1800w, https://images.theconversation.com/files/550951/original/file-20230928-27-f7cw8e.png?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;h=454&amp;fit=crop&amp;dpr=1 754w, https://images.theconversation.com/files/550951/original/file-20230928-27-f7cw8e.png?ixlib=rb-1.1.0&amp;q=30&amp;auto=format&amp;w=754&amp;h=454&amp;fit=crop&amp;dpr=2 1508w, https://images.theconversation.com/files/550951/original/file-20230928-27-f7cw8e.png?ixlib=rb-1.1.0&amp;q=15&amp;auto=format&amp;w=754&amp;h=454&amp;fit=crop&amp;dpr=3 2262w" alt="Graphic explainer showing the three types of households with their typical characteristics and food waste behaviours." /></a><figcaption><span class="caption">The three types of households with their typical characteristics and food waste behaviours.</span> <span class="attribution"><a class="source" href="https://doi.org/10.1016/j.foodqual.2023.105000">Trang Nguyen using Canva.com</a>, <a class="license" href="http://creativecommons.org/licenses/by-nc-nd/4.0/">CC BY-NC-ND</a></span></figcaption></figure> <h2>What can households do about their food waste?</h2> <p>Reducing household food waste involves changing behaviours in both food management (“upstream”) and waste management (“downstream”).</p> <p>Upstream measures aim to prevent food waste in the first place. For example, households can avoid buying or cooking too much food. Supporting households to plan and buy just the right amount of food is a great starting point.</p> <p>Once food waste has been produced, downstream measures come into play. The focus shifts to how we handle and dispose of this waste.</p> <p>When households engage in food waste recycling they <a href="https://doi.org/10.3390/su131911099">start thinking more</a> about their behaviour including purchasing and cooking.</p> <p>In Australia, food waste management is mainly the responsibility of local councils.</p> <p>There are three ways to target household food waste management and drive behavioural change:</p> <ul> <li> <p>providing kerbside collection of food organics and garden organics, also known as “FOGO”</p> </li> <li> <p>changing social norms around food waste</p> </li> <li> <p>offering economic incentives and disincentives.</p> </li> </ul> <h2>1. Providing a FOGO system</h2> <p>Councils should provide this option at a minimum. This ensures sufficient infrastructure is available to support motivated households to sort food waste.</p> <p>Unfortunately <a href="https://experience.arcgis.com/experience/e6b5c78e1dac47f88e7e475ffacfc49b">fewer than half of Australian councils</a> provide a garden organics system and only a quarter of councils provide a FOGO system.</p> <p>You can explore <a href="https://experience.arcgis.com/experience/e6b5c78e1dac47f88e7e475ffacfc49b">the FOGO interactive map</a> to see how your area stacks up.</p> <p><a href="https://www.greenindustries.sa.gov.au/resources/adelaide-metro-kerbside-waste-performance-report-2021-22">Most councils in metropolitan Adelaide</a> provide access to food waste recycling through the FOGO bin. But <a href="https://doi.org/10.1016/j.jclepro.2022.134636">our research</a> indicates more than half of household food waste still ends up in landfill. So we need additional programs to promote more sustainable behaviours.</p> <h2>2. Changing social norms</h2> <p>Social norms, the unspoken rules about what behaviours are deemed appropriate, can drive behavioural change.</p> <p>Examples of promoting social norms around food waste reduction include a <a href="https://www.stopfoodwaste.com.au/stop-food-waste-nationwide-consumer-campaign-summit-communique/">nationwide consumer campaign</a> on stopping food waste and the <a href="https://www.cityofadelaide.com.au/resident/recycling-waste/kitchen-caddies/">kitchen caddy</a> for benches to increase convenience for collecting food waste.</p> <p>But our research suggests some groups, like slackers, remain unmotivated without additional incentives. Economic incentives might motivate this group to engage in more sustainable behaviours.</p> <h2>3. Economic incentives</h2> <p>Currently, Australians pay for waste management through their council rates. This is a “pay-as-you-own” system.</p> <p>The cost is determined by the property’s value, regardless of the amount of waste generated. Renters indirectly contribute to this cost by paying rent.</p> <p>Neither owner-occupiers nor renters have any incentive to reduce waste generation when the cost is levied on property value rather than the amount of waste.</p> <p>An alternative approach gaining momentum in other parts of the world is the “pay-as-you-throw” approach, such as <a href="https://www.collectors2020.eu/wcs-ppw/stockholm-se/">Stockholm</a> and <a href="https://pocacito.eu/sites/default/files/WasteCharging_Taipei.pdf">Taipei</a>. This system charges households based on the weight of their waste, usually the general waste that needs to be discarded in landfill, while the collection of food waste and other recyclables remains free to encourage waste sorting.</p> <p>Recent <a href="https://doi.org/10.1016/j.jclepro.2023.137363">research</a> in Italy shows pay-as-you-throw schemes result in significant reductions in both the quantity of waste and costs associated with waste disposal in many Italian municipalities.</p> <p>The reduced costs flow on to savings for councils that could potentially reduce waste management fees passed on to homeowners and renters through council rates. Giving households incentives to reduce waste and find alternatives to disposal encourages residents to place a higher value on food that may otherwise be sent to landfill.</p> <h2>Reducing food waste is a win-win</h2> <p>Tackling food waste is a win-win for people and the planet. It’s worth using various approaches to encourage people to change their behaviour.</p> <p>Our findings can help inform the design of interventions aimed at reducing and sorting food waste in specific segments of the Australian population.<!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/214482/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https://theconversation.com/republishing-guidelines --></p> <figure><iframe src="https://www.youtube.com/embed/Dx7RWtfgbVw?wmode=transparent&amp;start=11" width="440" height="260" frameborder="0" allowfullscreen="allowfullscreen"></iframe><figcaption><span class="caption">No time to waste: Halving Australia’s food waste by 2030 (Fight Food Waste Cooperative Research Centre)</span></figcaption></figure> <p><a href="https://theconversation.com/profiles/trang-nguyen-1454838"><em>Trang Nguyen</em></a><em>, Postdoctoral Fellow, <a href="https://theconversation.com/institutions/university-of-adelaide-1119">University of Adelaide</a> and <a href="https://theconversation.com/profiles/patrick-oconnor-109973">Patrick O'Connor</a>, Associate Professor, <a href="https://theconversation.com/institutions/university-of-adelaide-1119">University of Adelaide</a></em></p> <p><em>Image credits: Getty Images</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/we-found-3-types-of-food-wasters-which-one-are-you-214482">original article</a>.</em></p>

Food & Wine

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The best cruise cabin for every type of need

<p><strong>So many options</strong></p> <p>Cruise accommodations – also known as staterooms or cabins – are your home away from home while at sea. Far from a one-size-fits-all decision, there are numerous factors to consider when determining the best rooms on a cruise ship to fit your and your companions’ needs.</p> <p>From size to location to view and beyond, there are many things to keep in mind when selecting your stateroom, says Gianluca Corneli, hotel director at Royal Caribbean International. “How many will stay in the room? Is your room a place to hang out or just where you sleep?” Also, think about what you’d like to be near on the ship. “For example, consider if you would like to be near the elevator for convenience or prefer a location down the hallway with fewer guests passing by,” she says. Also factor in any ways you’d like to elevate your stay, like maybe a balcony or a suite for your next Caribbean cruise.</p> <p>It’s no wonder that some of the best cruise lines offer up to 28 different types of rooms on a single ship – they want to ensure there’s an ideal solution for every guest. Let’s focus on upgrading your room choice to the perfect fit for your specific needs.</p> <p><strong>Best for avoiding seasickness</strong></p> <p><span style="text-decoration: underline;"><em>Choose</em></span>: the middle of the ship, on a low deck</p> <p>Picture a ship like a seesaw – the most movement will be felt on either end, while the middle stays fairly even-keel. “Middle and low, that’s where you want to be,” says cruise expert Dori Saltzman, senior editor with trade publication Travel Market Report. “While you don’t need to be on the absolute lowest passenger deck, you don’t want to go above the middle of the ship (vertical wise). You also want to try to be as middle (horizontal wise) as possible.</p> <p>If cabins in the middle of the ship aren’t available, she says to choose aft over forward, because the more forward a cabin is, the more you’ll feel the motion of the ocean. And while this may seem counter-intuitive, be sure to book a cabin with a window or balcony, so you can keep your eyes on the horizon if you start feeling queasy.</p> <p><strong>Best for great views</strong></p> <p><span style="text-decoration: underline;"><em>Choose</em></span>: a cabin with a balcony, preferably at the back of the ship</p> <p>While you can always go to the upper decks of any ship for 360-degree views of your surroundings, there’s no greater cruise ship luxury than enjoying the scenery from your own private balcony. They may also be called verandah cabins. Balconies are the perfect place to enjoy a cup of coffee in the morning or glass of champagne during a spectacular sunset and pretend you’re all alone at sea.</p> <p>And some of the absolute best rooms on a cruise ship are located at the rear, where you’ll also be treated to the photo-worthy wake left behind, which is a fun way to mark your ship’s progress. Balconies are also nice for having access to fresh air when you want it, it can be very soothing to listen to the sounds of the ocean from your stateroom, and you’ll have a better chance of spotting wildlife along your cruise too.</p> <p><strong>Best for light sleepers</strong></p> <p><span style="text-decoration: underline;"><em>Choose</em></span>: a deck filled with other guest cabins and away from elevators</p> <p>Finding the best rooms on a cruise ship for light sleepers usually takes a little research, but that due diligence will pay off come bedtime. “You need your cabin to be located away from any bank of elevators, but also away from crew entrances,” says Saltzman. So being surrounded by other cabins of people who want to sleep too is a safe bet. “You also don’t want your cabin to be located above the ship’s main theatre, underneath any restaurants where you can hear the chairs scraping on the floor or under/over any of the lounges that have music late into the night.”</p> <p>Finally, you don’t want to be on a low deck that’s too aft or too forward, as you may end up above the engines or the anchor, which makes a lot of noise when it’s lowered and raised. You may feel a bit like Goldilocks trying to choose that perfect cabin on your next romantic cruise, but the reward of peace and quiet will be priceless.</p> <p><strong>Best for a little more space</strong></p> <p><span style="text-decoration: underline;"><em>Choose</em></span>: a forward-facing cabin</p> <p>While you aren’t likely to find a balcony on a forward-facing cabin, you may find more interior space than similarly priced mid-ship cabins. Why? There are some odd angles in forward-facing cabins that the designers had to work around, thanks to the slanted style of the front of a ship. Those odd angles may work in your favour when it comes to square footage.</p> <p>It’s important to note that while these are some of the best rooms on a cruise ship for extra space, you will experience the most movement in a front-facing cabin, so this choice is not an ideal position for anyone prone to motion sickness.</p> <p><strong>Best for cruising with little kids</strong></p> <p>Most cruise lines offer family-friendly cruises and specific cabins suited for kids, which can be a mix of in-room amenities and proximity to other areas of the ship children will love. “On Disney’s ships, all cabins have two bathrooms, one with a sink and toilet and the other with a shower/bath combo (a small minority of rooms do not have the tub) for families that need the little one to be able to take a bath, while everyone else is still able to wash up,” says Saltzman.</p> <p>“Another good option is the Family Harbour cabins on Carnival’s Vista-class ships (Vista, Horizon, Panorama) and Excel-class ships (Mardi Gras, Celebration). Similar to the Disney cabins, these have two bathrooms, one a full one with a shower, sink and toilet, and the other with a sink and shower/tub combo.”</p> <p><strong>Best for staying on a budget</strong></p> <p><span style="text-decoration: underline;"><em>Choose</em></span>: an interior cabin</p> <p>Unless you’re worried about feeling claustrophobic – since there will be no porthole or window to the outside world – an interior cabin is a nice option for saving money (we’re talking $300 for 7-day cruises). Not only is it the lowest-priced cabin type, which means you’ll have more funds to put toward excursions, a drink package or souvenirs, but you’ll also be able to take midday naps or sleep in later because there won’t be any light sneaking in.</p> <p>Another positive is that an interior cabin might encourage you to spend more of your free time roaming around the ship, meeting other people and getting more involved in activities, since you may not find it desirable to spend your time beyond sleeping and showering in a windowless box.</p> <p><strong>Best for mobility disabilities </strong></p> <p><span style="text-decoration: underline;"><em>Choose</em></span>: an accessible stateroom</p> <p>For passengers with limited mobility or no mobility, most major cruise lines offer accessible staterooms in a variety of room types (inside cabin, ocean view and balcony). These options do vary based on the cruise line and the age of the ship, so it’s best to research this in advance and factor the accessible options available into your cruise planning process.</p> <p>Accessible rooms tend to be larger than standard cabins to accommodate wheelchair or scooter users, and they also feature larger bathrooms. Additionally, some rooms will have emergency-call buttons or specific amenities for hearing or vision-impaired guests. For instance, the fully accessible rooms on Holland America Line provide adequate turning space, accessibility routes throughout the room, roll-in showers, wheelchair access on both sides of the bed, handlebars in the shower and hand-held shower heads, says Sissel Bergersen, director of rooms division, Holland America Line. Before you lock in a booking, it may be best to call the cruise line and explain your needs so they can help steer you toward the perfect cabin.</p> <p><strong>Best for being spoiled rotten</strong></p> <p><span style="text-decoration: underline;"><em>Choose</em></span>: a cabin with butler service or a spa cabin</p> <p>For travellers who like adult-only cruises or who are yearning for a little extra pampering, the best rooms on a cruise ship fall into one of two categories. The first is a suite that comes with butler service, where you’ll have someone helping with all the details you don’t want to spend your precious holiday time tending to – like reserving prime-time dinner slots at specialty restaurants, booking shore excursions, packing and unpacking and even drawing rose petal bubble baths. Rooms at this level may also come with exclusive access to private pools, clubs and lounges with more luxurious touches and solitude than you’ll find elsewhere on the ship.</p> <p>The other category that’s becoming increasingly popular is spa suites. On Norwegian Cruise Line, the Haven Spa Suite, Spa Club Balcony Suites and Spa Balcony (available on the Norwegian Escape, Norwegian Bliss and Norwegian Epic) have varying amenities that range from more tranquil room décor with an oversized shower and body spray jets to priority access to Mandara Spa. And on Celebrity Cruises, the AquaClass staterooms are focused on wellness, with a pillow menu, complimentary fitness pass, preferential rates on spa packages, healthy room-service menu options, an exclusive restaurant, a spa concierge, access to the SEA Thermal Suite and a yoga mat for use onboard.</p> <p><strong>Best for solo cruisers</strong></p> <p><em><span style="text-decoration: underline;">Choose</span></em>: a cruise line that offers single rooms or waives single supplements</p> <p>Solo cruises are a wonderful experience, yet so many cruise lines penalise single cruisers by forcing them to pay a ‘single supplement.’ This surcharge is added to the fare of a solo passenger, since cruise room pricing is generally based on double occupancy. This fee can be an additional 10 per cent all the way up to a full 100 per cent of the rate, making solo cruising unaffordable for many travellers.</p> <p>Instead, look for cruise lines that offer single staterooms, like Celebrity, which has the Edge Single Stateroom with Infinite Veranda (available on Celebrity Edge, Celebrity Apex, Celebrity Beyond and Celebrity Ascent) and the Single Inside Stateroom on Celebrity Silhouette. Other cruise lines, including Holland America Line, Royal Caribbean and Norwegian Cruise Line, also offer single cabins – these special solo and studio cabins aren’t subject to single supplements. Occasionally, you may even find cruise lines running special promotions and waiving their single supplement for a regular-size room.</p> <p><em>Image credits: Getty Images</em></p> <p><em>This article originally appeared on <a href="https://www.readersdigest.com.au/travel/cruising/the-best-cruise-cabin-for-every-type-of-need" target="_blank" rel="noopener">Reader's Digest</a>. </em></p>

Cruising

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The best skin-care routine for oily skin, according to dermatologists

<p><strong>What is oily skin?</strong></p> <p>Oily skin is exactly what it sounds like: skin characterised by the production of a lot of oil. If you’re constantly dealing with shininess, always feel like your face has been hit by an oil slick by the end of the day or tend to notice a bit of oil buildup across your nose and forehead, it may be time to invest in a skin-care routine for oily skin.</p> <p>Need another reason to target oily skin with your daily regimen? Because it produces so much oil (also known as sebum), this skin type often goes hand in hand with acne. But take heart: if you’re battling breakouts, you’re in good company. According to the Australasian College of Dermatologists, acne is the most common of skin diseases and up to 85 per cent of Australians will develop it during their lifetime.</p> <p>Luckily, there are great skin-care formulations that can help oily skin avoid acne and stay healthy, and some formulas may even help curb oil production. Finding the best skin-care routine for oily skin just takes a little know-how, so we reached out to board-certified dermatologists Dr Corey L. Hartman and Dr David Kim to find out what makes a great oily-skin routine.</p> <p><strong>What causes oily skin?</strong></p> <p>“Oily skin is genetic, and it has to do with the size and activity of the oil glands that are associated with the hair follicles,” Dr Hartman explains. “That means if you have thicker hair, you may have thicker or larger oil glands.”</p> <p>Another thing that can impact the amount of oil your skin produces? Hormones. That’s why acne, which is so often associated with oily skin, commonly shows up during puberty, and for those who menstruate, around their periods.</p> <p>Now that you know what triggers oiliness, it’s time to put together your ideal skin-care routine for oily skin – and it’s simpler than it sounds. As Dr Kim notes, when it comes to oily skin types, less is more. “It’s best not to add too many layers for oily skin,” he says. “Otherwise, it can clog your pores and cause acne flares.”</p> <p>If you’re ready to get glowing (but not shiny!) skin, follow the regimen below. Trust us: skin care for oily skin has never been easier.</p> <p><strong>Skin-care routine for oily skin</strong></p> <p>The heart of a good skin-care routine for oily skin has four main daily steps:</p> <p>Cleanser</p> <p>Toner</p> <p>Moisturiser</p> <p>Sunscreen</p> <p>There are additional steps you can add in if necessary or as needed:</p> <p>Exfoliator</p> <p>Acne treatment</p> <p>If hitting all those steps sounds intimidating, don’t worry. We have everything you need to know, including product recommendations.</p> <p><strong>1. Cleanser</strong></p> <p>Every good skin-care routine – including one for oily skin – begins with a good cleanser. You want to use it twice a day: once in the morning to prep your skin to apply your products, and again at night to take off any debris you’ve collected throughout the day.</p> <p>You might’ve heard that you can skip a morning cleansing, but rinsing without washing is better suited to a skin-care routine for dry skin. If yours is oily, go ahead and use a cleanser in the morning and at night.</p> <p>Dr Hartman says that for oily skin, the best face wash is likely “something a little astringent” that uses hydroxy acids or benzoyl peroxide. “You don’t want to do so much that it pushes you in the direction of overly drying,” he explains. That can lead your skin to produce more oil, a process called rebound oiliness.</p> <p>As for the best face wash formulations, Dr Hartman recommends staying away from oils, which can sometimes be comedogenic. (In other words, they can clog your pores.) Instead, look for gel, foam or cream cleansers.</p> <p><strong>2. Toner</strong></p> <p>Toner is technically an optional skin-care step, but many dermatologists recommend it for oily skin because it can help regulate sebum. These watery formulas are meant to eliminate any leftover makeup and grime left after cleansing, while treating the skin with helpful ingredients.</p> <p>What’s the best way to use them? “Once or twice a day on a cotton pad,” says Dr Kim. “Apply to [your] full face.”</p> <p>The best toner for you depends on your goals: Are you aiming for better skin texture? Regulated oil production? A combination of both? According to Dr Kim, if you have oily skin, look for gentle exfoliating acids, such as glycolic or lactic acid, to gently resurface the skin. Or go with salicylic acid to help with sebum control.</p> <p>You’ll know you’ve found the right one when your skin feels soft and smooth after use, not tight or dry. Luckily, unlike the harsh toners of the past, today’s formulas are much gentler and more foolproof.</p> <p><strong>3. Moisturiser</strong></p> <p>Yes, oily skin needs moisturiser. It may sound counterintuitive, but keeping your skin moisturised means it won’t have to work as hard to keep hydration levels up! In fact, Dr Hartman says it’s one of the keys to holding off rebound oiliness. You want to use it morning and night, after cleansing.</p> <p>When looking for the best moisturiser for oily skin, the formula is everything. “I like things that are less creamy and more like a serum or gel base,” says Dr Hartman. “You want something light, nothing too heavy, nothing too emollient,” he explains. In other words, look for terms like daily or sheer, and skip thicker formulas – night creams and bottles marked intense may be too heavy for oily skin. One thing to stay away from: oils, as they can be comedogenic, meaning they may clog pores.</p> <p><strong>4. Sunscreen</strong></p> <p>Sun damage impacts every skin type, including oily skin, so having SPF in your morning routine is non-negotiable. And, yes, that means you need to use it year-round, even on cloudy days and in the winter.   (And don’t forget the scalp sunscreen!)</p> <p>Admittedly, sunscreen can make your skin look a little oily, so finding a nongreasy sunscreen is essential (more on that in a second). But Dr Kim reassures us that’s not impossible. “If you’re using good skin care that helps exfoliate and regulate sebum production, you should be able to wear sunscreen without feeling too greasy,” he says.</p> <p>When it comes to the best face sunscreens for oily types, lightweight daily formulas win. Just be sure yours has an SPF of 30 or higher.</p> <p>Whether you reach for a mineral or chemical sunscreen is a matter of personal preference, and it often comes down to how they wear on your skin (mineral sunscreens can sometimes leave a white cast). “The goal is to find your favourite sunscreen – chemical or mineral – and actually use it every day,” says Dr Kim.</p> <p>Powder sunscreens are a good option for touching up oily skin – they allow you to reapply SPF on the go while soaking up oil. Sunscreen oils, on the other hand, are best avoided. “These can clog the pores,” he says.</p> <p><strong>Exfoliant</strong></p> <p>Exfoliators help remove the dead skin cells that can mix with sebum and clog pores, which is why exfoliating can be an important step in your routine.</p> <p>There are two categories of exfoliants: chemical (like glycolic and salicylic acid or retinols, which increases cell turnover) and physical (scrubs that use friction). Dr Hartman recommends starting with chemical exfoliators, as “they’re a more controlled way of exfoliation,” he says.</p> <p>Apply an exfoliator once or twice a week – or more if your skin can handle it – either in the morning or at night. You may need to start slow, only using it more often if you don’t experience irritation. Beyond that, exfoliate only for very special events, when you really want a glow. That way, you won’t trigger irritation.</p> <p>Dr Hartman’s go-to products for oily skin are prescription retinoids or over-the-counter retinols – not surprising, as these vitamin A derivatives are darlings of the dermatology world. But retinoids are harsh chemicals. “For retinol, start using a pea-size [amount] only twice weekly, and let your skin develop tolerance,” says Dr Kim. You’ll want to apply retinol at night and be extra careful about wearing sunscreen during the day.</p> <p>For people who don’t tolerate them well, Dr Hartman says an alpha hydroxy acid (like glycolic acid) or beta hydroxy acid (like salicylic acid) is a great alternative. If you prefer a physical facial scrub, remember: the finer the particles, the better.</p> <p><strong>Acne treatment</strong></p> <p>First, forget about spot-treating blemishes – if you’re dealing with acne, Dr Kim insists it’s best to treat your whole face. That way, you prevent breakouts before they have a chance to form. And if you’re struggling with breakouts, he says, “you should use at least one prescription cream on your full face to treat existing pimples and prevent new ones.”</p> <p>Heads up: retinoids don’t just aid exfoliation; they can treat acne too. If you’re using a retinoid for acne control and have sensitive skin, you may want to consider this your combo acne and exfoliating treatment. It covers both needs, and including an additional exfoliant in your skin-care routine may cause irritation, especially if your skin is sensitive.</p> <p>If acne is something you grapple with more than occasionally, see your dermatologist for a prescription cream – your doctor will pick the formula that’s best for your skin. If it’s a retinoid, you’ll use this at night.</p> <p>But if you only experience the occasional pimple and would rather go for an over-the-counter option, you’ve got some choices. First things first: you’re going to want a cream rather than a medicated face wash. Sure, face washes offer some acne-fighting ingredients, but you wash them away almost immediately. “Acne wash stays on your face for five seconds, so you need something that will stay on your skin the whole day or night,” Dr Kim explains.</p> <p>While you may see a few other ingredients (like azelaic acid) pop up in the acne world, when it comes to OTC options, there are two all-star ingredients: salicylic acid and benzoyl peroxide. Both are effective, but of the two, benzoyl peroxide tends to get a little more love – it’s especially effective when combined with antibiotics (under a doctor’s care), according to the Mayo Clinic.</p> <p>Just be aware that it can bleach fabrics, so make sure to let it really soak in before getting dressed. And, again, make sure to apply it to your whole face, not just one pimple. Remember, your goal is to avoid pimples in the first place.</p> <p><strong>Skin-care tips experts swear by</strong></p> <p>Armed with our dermatologist-approved skin-care routine for oily skin, you’re well on your way to a less-greasy face. But there are a couple more things to consider as you follow this regimen.</p> <p><strong>Skin care and exercise</strong></p> <p>You know you need to wash your face in the morning and at night. But what if you’re feeling particularly grimy midday? If you work out in the middle of the day, for instance, should you wash your face if you have oily skin? “You probably don’t need to do that,” says Dr Hartman. “Twice a day is enough.”</p> <p>Adding an additional cleansing session may dry your skin out, causing more oiliness. You do want to rinse your face, however. That’ll prevent the sweat, debris and oil from mixing and clogging your pores. And it has the added bonus of leaving you refreshed after a gruelling workout.</p> <p><strong>Smart product use</strong></p> <p>Take your time when introducing ingredients. Before slathering a new product all over your face, do a spot test to make sure your skin can handle it. And when dealing with ingredients like benzoyl peroxide and retinoids, which some people find irritating, start slow to acclimate your face, building to more frequent use as your skin adjusts to the ingredient.</p> <p><em>Image credits: Getty Images</em></p> <p><em>This article originally appeared on <a href="https://www.readersdigest.com.au/healthsmart/the-best-skin-care-routine-for-oily-skin-according-to-dermatologists?pages=1" target="_blank" rel="noopener">Reader's Digest</a>. </em></p>

Beauty & Style

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No, you can’t reverse ageing by injecting ‘young blood’ and fasting. But that doesn’t stop people trying

<p><a href="https://theconversation.com/profiles/rachael-jefferson-buchanan-297850">Rachael Jefferson-Buchanan</a>, <em><a href="https://theconversation.com/institutions/charles-sturt-university-849">Charles Sturt University</a></em></p> <p>Like many celebrities and entrepreneurs, 45-year-old US tech billionaire Bryan Johnson is <a href="https://www.smh.com.au/lifestyle/health-and-wellness/taking-the-blood-of-your-17-year-old-son-anti-ageing-has-gone-too-far-20230530-p5dcd6.html">trying to reverse the ageing process</a>.</p> <p>Spending an average of US$2 million a year on an anti-ageing regimen, Johnson <a href="https://medium.com/future-literacy/at-45-i-now-age-slower-than-the-average-10-year-old-6932448fc608">claims</a> he now ages slower than some children. He explains: “the pace my body accumulates ageing damage is less than the average ten year old”.</p> <p>Many of Johnson’s age-reversal methods are questionable, involve dodgy science, and have known side effects.</p> <p>While you can’t stop the ageing process, and the gradual decline our bodies experience as we advance in years, there are some things we can all do – for free – to maintain our health as we age.</p> <h2>What does Johnson do? And is it scientific?</h2> <p><strong>Fasting</strong></p> <p>Johnson reports fasting for 23 hours a day. He then eats <a href="https://medium.com/future-literacy/one-meal-23-hr-fast-100-nutrition-18187a2f5b">one meal a day</a>: 2,250 calories of nutrient-dense food “customised” to his body’s needs.</p> <p>Eating for time-restricted periods in the day can have a <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9650338/">positive effect</a> on how we <a href="https://pubmed.ncbi.nlm.nih.gov/29955217/">metabolise nutrients</a>, inflammation levels, hormonal regulation, and <a href="https://www.health.harvard.edu/blog/how-good-is-your-cardiometabolic-health-and-what-is-that-anyway-202208182803">cardiometabolic health</a> (blood sugar, <a href="https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/triglycerides/art-20048186">triglycerides</a>, cholesterol, blood pressure, BMI and waist circumference).</p> <p>However, a Spartan-like food intake can <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2121099/">impair</a> how our body responds to sugar (known as glucose tolerance). And it’s not necessarily any more effective for weight maintenance than <a href="https://pubmed.ncbi.nlm.nih.gov/29419624/">reducing calorie intake at each meal</a>.</p> <p>Large-scale, long-term human trials are needed to confirm the <a href="https://pubmed.ncbi.nlm.nih.gov/34728336/">limited risk-benefit</a> findings of fasting.</p> <p><strong>Acid peels</strong></p> <p>Johnson has weekly <a href="https://www.asds.net/skin-experts/skin-treatments/chemical-peels/chemical-peels-for-aging-skin">acid peels</a> (which use a mild acid to exfoliate the skin) to maintain a “youthful glow”.</p> <p>But you cannot smooth sagging facial skin or remove deep scars or wrinkles. Acid peels also <a href="https://www.mayoclinic.org/tests-procedures/chemical-peel/about/pac-20393473">come with risks</a>, including organ damage, infection, scarring and swelling.</p> <p><strong>Plasma infusions</strong></p> <p>Perhaps the most bizarre youth-inducing procedure Johnson has attempted is receiving blood transfusions from his 17-year-old son.</p> <p>US biotech companies have explored <a href="https://www.theguardian.com/society/2020/feb/02/could-young-blood-stop-us-getting-old-transfusions-experiments-mice-plasma">plasma infusions</a> to tackle age-related diseases in humans for decades. But there are no proven clinical benefits.</p> <p><a href="https://www.redcrossblood.org/donate-blood/blood-donation-process/what-happens-to-donated-blood/blood-transfusions/risks-complications.html">Side effects from blood transfusions</a> include blood-borne infections, fever and allergic reactions.</p> <h2>Historical attempts to stay youthful</h2> <p>Humans have been experimenting with <a href="https://academic.oup.com/biomedgerontology/article/59/6/B515/662071">anti-ageing methods for centuries</a>. These have included all sorts of behavioural and lifestyle practices that are quirky, questionable, and even sadistic.</p> <p>Ancient practices included <a href="https://www.marieclaire.com/beauty/news/a14382/anti-aging-beauty-through-history/">crocodile dung face masks</a>, which the Greeks and Romans used to brighten their complexions.</p> <p>Romans also used <a href="https://beautytap.com/2019/03/donkey-milk">donkey milk</a> and <a href="https://www.ancient-origins.net/history/swans-fat-crocodile-dung-and-ashes-snails-achieving-beauty-ancient-rome-003240">swan fat</a> to minimise wrinkles, due to their acclaimed rejuvenating properties.</p> <p><a href="https://www.livescience.com/44071-cleopatra-biography.html">Cleopatra</a> apparently took daily baths in sour donkey milk. To sustain this lavish habit, she had a <a href="https://www.naturanecosmetics.com/en/content/26-faits-historiques">herd of 700 donkeys</a>. Sour milk contains <a href="https://science.jrank.org/pages/3780/Lactic-Acid-Lactic-acid-in-foods.html">lactic acid</a>, a naturally occurring <a href="https://www.mecca.com.au/edits/ingredients/alpha-hydroxy-acids/">alpha-hydroxy acid (AHA)</a> that exists in many modern-day exfoliants. So this idea was grounded in basic science, at least.</p> <figure class="align-center "><img src="https://images.theconversation.com/files/530478/original/file-20230607-27-bv0w1t.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px" srcset="https://images.theconversation.com/files/530478/original/file-20230607-27-bv0w1t.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=600&amp;h=400&amp;fit=crop&amp;dpr=1 600w, https://images.theconversation.com/files/530478/original/file-20230607-27-bv0w1t.jpg?ixlib=rb-1.1.0&amp;q=30&amp;auto=format&amp;w=600&amp;h=400&amp;fit=crop&amp;dpr=2 1200w, https://images.theconversation.com/files/530478/original/file-20230607-27-bv0w1t.jpg?ixlib=rb-1.1.0&amp;q=15&amp;auto=format&amp;w=600&amp;h=400&amp;fit=crop&amp;dpr=3 1800w, https://images.theconversation.com/files/530478/original/file-20230607-27-bv0w1t.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;h=503&amp;fit=crop&amp;dpr=1 754w, https://images.theconversation.com/files/530478/original/file-20230607-27-bv0w1t.jpg?ixlib=rb-1.1.0&amp;q=30&amp;auto=format&amp;w=754&amp;h=503&amp;fit=crop&amp;dpr=2 1508w, https://images.theconversation.com/files/530478/original/file-20230607-27-bv0w1t.jpg?ixlib=rb-1.1.0&amp;q=15&amp;auto=format&amp;w=754&amp;h=503&amp;fit=crop&amp;dpr=3 2262w" alt="Milk bath with dried fruits and flowers" /><figcaption><span class="caption">Don’t waste milk on a bath.</span> <span class="attribution"><a class="source" href="https://www.shutterstock.com/image-photo/bath-milk-flowers-1051210370">Shutterstock</a></span></figcaption></figure> <p>During the 16th and 17th century, “Countess Dracula” aka <a href="https://en.wikipedia.org/wiki/Elizabeth_B%C3%A1thory">Elizabeth Bathory</a> allegedly resorted to serial killing to quench her thirst for youthfulness, <a href="https://www.nationalgeographic.com/travel/article/the-bloody-legend-of-hungarys-serial-killer-countess">bathing in the blood of her young victims</a>.</p> <h2>The quest continues with cryotherapy</h2> <p>Fountain of youth fixations have inspired many contemporary anti-ageing trends. Exposure to cold is a firm favourite.</p> <p><a href="https://www.nature.com/articles/s43587-023-00383-4">Some research</a> suggests this could have <a href="https://neurosciencenews.com/cold-aging-22928/">benefits</a> relating to longevity, by slowing cellular degeneration, <a href="https://www.cryo.com.au/anti-ageing-benefits-of-whole-body-cryotherapy/">stimulating collagen and elastin production</a>, increasing the metabolism, and reducing inflammation.</p> <p>Dutch motivational speaker Wim Hof includes <a href="https://www.wimhofmethod.com/cold-water-immersion">cold water immersion</a> as one of the three pillars of his <a href="https://www.wimhofmethod.com/">Wim Hof Method</a> to “increase mind-body connection”.</p> <p>Athletes such as <a href="https://www.dailymail.co.uk/sport/football/article-2469985/Cristiano-Ronaldo-buys-Cryotherapy-chamber.html">Cristiano Ronaldo</a> use <a href="https://my.clevelandclinic.org/health/treatments/21099-cryotherapy">cryotherapy</a>, exposing their bodies to extremely cold temperatures for two to four minutes to decrease the signs of ageing and enhance their general health.</p> <p>However, the <a href="https://www.medicinenet.com/what_are_the_side_effects_of_cryotherapy/article.htm">risks of cryotherapy</a> include bone fractures, frostbite, nerve damage, bleeding, cramping, swelling and skin infections.</p> <h2>So what can we do to age well?</h2> <p>Two of the more mainstream anti-ageing methods that Johnson recommends are the daily self-care habits of sleep and exercise.</p> <p>He has a <a href="https://medium.com/future-literacy/sleep-and-impulse-control-87e844218ff2">strict sleep schedule</a> that involves retiring to bed at 8pm, with a one-hour wind-down in a darkened room.</p> <p>Adults report poorer sleep quality and difficulty being able to sleep for long enough <a href="https://www.news-medical.net/health/How-Does-the-Suprachiasmatic-Nucleus-(SCN)-Control-Circadian-Rhythm.aspx">as they age</a>. Sleeping too much or too little is <a href="https://www.frontiersin.org/articles/10.3389/fpubh.2023.1043347/full">associated with</a> a greater risk of obesity, heart disease and <a href="https://theconversation.com/research-check-can-sleeping-too-much-lead-to-an-early-death-101323">premature death</a>.</p> <p>Developing a regular sleep routine, reducing bedroom distractions such as mobile phones, and exercising regularly can all help to <a href="https://www.sleepfoundation.org/aging-and-sleep">alleviate sleep problems</a>.</p> <figure class="align-center "><img src="https://images.theconversation.com/files/530491/original/file-20230607-29-cw0f29.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px" srcset="https://images.theconversation.com/files/530491/original/file-20230607-29-cw0f29.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=600&amp;h=383&amp;fit=crop&amp;dpr=1 600w, https://images.theconversation.com/files/530491/original/file-20230607-29-cw0f29.jpg?ixlib=rb-1.1.0&amp;q=30&amp;auto=format&amp;w=600&amp;h=383&amp;fit=crop&amp;dpr=2 1200w, https://images.theconversation.com/files/530491/original/file-20230607-29-cw0f29.jpg?ixlib=rb-1.1.0&amp;q=15&amp;auto=format&amp;w=600&amp;h=383&amp;fit=crop&amp;dpr=3 1800w, https://images.theconversation.com/files/530491/original/file-20230607-29-cw0f29.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;h=482&amp;fit=crop&amp;dpr=1 754w, https://images.theconversation.com/files/530491/original/file-20230607-29-cw0f29.jpg?ixlib=rb-1.1.0&amp;q=30&amp;auto=format&amp;w=754&amp;h=482&amp;fit=crop&amp;dpr=2 1508w, https://images.theconversation.com/files/530491/original/file-20230607-29-cw0f29.jpg?ixlib=rb-1.1.0&amp;q=15&amp;auto=format&amp;w=754&amp;h=482&amp;fit=crop&amp;dpr=3 2262w" alt="Child and grandfather walk on a beach" /><figcaption><span class="caption">Exercise is also important for healthy ageing.</span> <span class="attribution"><a class="source" href="https://unsplash.com/photos/s-vhziQHngM">Vidar Nordi Mathisen/Unsplash</a></span></figcaption></figure> <p>Exercise, often cited as a <a href="https://www.marketwatch.com/story/exercise-is-the-wonder-drug-for-healthy-aging-11633642719">wonder drug for healthy ageing</a>, is something Johnson takes very seriously. He does a “<a href="https://www.youtube.com/watch?v=HNywRJgCRaQ">Blueprint</a>” workout that includes specially designed daily techniques, as well as <a href="https://www.hsph.harvard.edu/nutritionsource/high-intensity-interval-training/">high-intensity interval training sessions</a>, hiking and playing sport.</p> <p>From middle age onwards, we all need to exercise regularly, to increase our muscle mass, bone density, strength, endurance, coordination and balance. One of the greatest health risks for older people is <a href="https://www.ncbi.nlm.nih.gov/books/NBK560761/">falling</a>, which balance, flexibility, endurance and strength training <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC381224/">can help</a> reduce. Physical activity can bring <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5408452/">social benefits</a> in older adults if undertaken in groups, and there are well-known <a href="https://www.whiddon.com.au/yourlife/the-mental-health-benefits-of-exercise-for-older-adults/">mental health gains</a>.</p> <p>Small changes in sleep, diet (eating <a href="https://health.gov/news/202107/nutrition-we-age-healthy-eating-dietary-guidelines">plenty of vegetables, fruit, wholegrains, healthy fats, and enough protein</a>), and exercise can support <a href="https://bmcgeriatr.biomedcentral.com/articles/10.1186/s12877-020-01900-5">healthy ageing</a>, reducing the chance of early death, and helping us all to lead an active and independent life in our senior years. Now that <em>is</em> something worth investing in.<!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/207038/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https://theconversation.com/republishing-guidelines --></p> <p><a href="https://theconversation.com/profiles/rachael-jefferson-buchanan-297850">Rachael Jefferson-Buchanan</a>, Lecturer in Human Movement Studies (Health and PE) and Creative Arts, <em><a href="https://theconversation.com/institutions/charles-sturt-university-849">Charles Sturt University</a></em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/no-you-cant-reverse-ageing-by-injecting-young-blood-and-fasting-but-that-doesnt-stop-people-trying-207038">original article</a>.</em></p> <p><em>Images: Getty</em></p>

Body

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Type 1 diabetes sufferers in for price hike

<p>Those suffering from Type 1 diabetes will be hit with a steep hike in prescription costs when a life-changing insulin is removed from the Pharmaceutical Benefits Scheme (PBS) in April 2023.</p> <p>Local Member for Fairfax Ted O’Brien and Shadow Minister for Health and Aged Care Senator Anne Ruston have revealed 15,000 Australian families will be affected when the drug Fiasp becomes less accessible from April 1.</p> <p>Fiasp is a mealtime insulin that is designed to improve blood sugar control in diabetes sufferers at a faster rate than alternative diabetes medications.</p> <p>Mr O’Brien said he was made aware of the issue by the mother of a young high school student on the Sunshine Coast “whose quality of life will now be at risk from the government’s decision”.</p> <p>“Freya Goldston is a 14-year-old, high-performing student in my electorate who will tell anybody about the remarkable impact that this medicine has had on her life,” Mr O’Brien said.</p> <p>“Freya’s family will have her prescription go from around $7 to more than $280 at a time when households are already under serious financial pressure.</p> <p>“The Labor Government needs to provide an immediate solution to support the 15,000 families who will otherwise need to start making decisions about what household expenses they can cut back on to afford this life-changing medicine.”</p> <p>Mr O’Brien shared the former Coalition Government listed Fiasp on the PBS in 2019 to ensure accessible prices to the fast-acting insulin for diabetes patients.</p> <p>“But now, without any consultation or support for the patients impacted, the government’s decision to suddenly remove Fiasp from the PBS is sending the price soaring,” he said.</p> <p>A spokesperson for Health Minister Mark Butler said his office was alerted of the drug manufacturer Novo Nordisk removing Fiasp from the PBS on February 22 2023.</p> <p>“The minister’s office is now working with the department and Novo Nordisk,” the spokesperson said.</p> <p>“We understand the decision by Novo Nordisk to remove Fiasp from the PBS has been concerning for many Australians living with diabetes and their families.”</p> <p>The spokesperson did not comment on whether there was consultation or support for impacted diabetics when Mr Butler was approached about the removal of Fiasp.</p> <p>Nearly 28,000 people have signed a petition online created by Belinda Moore called “Save Fiasp from falling off the PBS”.</p> <p>“The Australian diabetes community will keep advocating until we witness no evidence of inequitable access to diabetes services, clinicians, technology and therapies.”</p> <p>Ms Ruston also said he was disappointed in the government's decision as Australians are already suffering from a cost-of-living crisis, and the removal of Fiasp from the PBS will affect thousands of Australians.</p> <p>“The government must urgently guarantee that they will provide sufficient support to ensure the viability of affordable diabetes medications in Australia,” Ms Ruston said.</p> <p><em>Image credit: Shutterstock</em></p>

Caring

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Why certain types of music make our brains sing, and others don’t

<p>A few years ago, Spotify published an online <a href="https://www.francetvinfo.fr/culture/musique/spotify-devoile-une-cartographie-des-gouts-musicaux_3320877.html">interactive map</a> of musical tastes, sorted by city. At the time, <a href="https://open.spotify.com/artist/5TEGxYftTkeKmLXkZjHNUE">Jeanne Added</a> prevailed in Paris and Nantes, and London was partial to local hip hop duo <a href="https://open.spotify.com/artist/31lnFZEM6ysvjOx59VyxRE">Krept and Kronan</a>. It is well established that music tastes vary over time, by region and even by social group. However, most brains look alike at birth, so what happens in them that causes us to end up with such disparate music tastes?</p> <h2>Emotions – a story of prediction</h2> <p>If one presented you with a unknown melody and suddenly stopped it, you could be able to sing the note you think fit the best. At least, professional musicians could! In a <a href="https://www.jneurosci.org/content/41/35/7449">study</a> published in the Journal of Neuroscience in September 2021, we show that similar prediction mechanisms are happening in the brain every time we listen to music, whithout us being necessarly conscious of it. Those predictions are generated in the auditory cortex and merged with the note that was actually heard, resulting in a “prediction error”. We used this prediction error as a sort of neural score to measure how well the brain could predict the next note in a melody.</p> <p>Back in <a href="https://books.google.fr/books/about/Emotion_and_Meaning_in_Music.html?id=HuWCVGKhwy0C&amp;redir_esc=y">1956</a>, the US composer and musicologist Leonard Meyer theorised that emotion could be induced in music by a sense of satisfaction or frustration derived from the listener’s expectations. Since then, academic advances have helped identify a link between musical expectations and other more complex feelings. For instance, participants in <a href="https://onlinelibrary.wiley.com/doi/10.1111/cogs.12477">one study</a> were able to memorize tone sequences much better if they could first accurately predict the notes within.</p> <p>Now, basic emotions (e.g., joy, sadness or annoyance) can be broken down into two fundamental dimensions, valence and psychological activation, which measure, respectively, how positive an emotion is (e.g., sadness versus joy) and how exciting it is (boredom versus anger). Combining the two helps us define these basic emotions. Two studies from <a href="https://link.springer.com/article/10.3758/s13415-013-0161-y">2013</a> and <a href="http://webprojects.eecs.qmul.ac.uk/marcusp/papers/SauveEtAl2018.pdf">2018</a> showed that when participants were asked to rank these two dimensions on a sliding scale, there was a clear relationship between prediction error and emotion. For instance, in those studies, music notes that were less accurately predicted led to emotions with greater psychological activation.</p> <p>Throughout the history of <a href="https://www.nature.com/articles/nrn1406">cognitive neuroscience</a>, pleasure has often been linked to the reward system, particularly with regard to learning processes. <a href="https://www.cell.com/current-biology/pdf/S0960-9822(14)01207-X.pdf">Studies</a> have shown that there are particular dopaminergic neurons that react to prediction error. Among other functions, this process enables us to learn about and predict the world around us. It is not yet clear whether pleasure drives learning or vice versa, but the two processes are undoubtedly connected. This also applies to music.</p> <p>When we listen to music, the greatest amount of pleasure stems from events predicted with only a moderate level of accuracy. In other words, overly simple and predictable events – or, indeed, overly complex ones – do not necessarily induce new learning and thus generate only a small amount of pleasure. Most pleasure comes from the events falling in between – those that are complex enough to arouse interest but consistent enough with our predictions to form a pattern.</p> <h2>Predictions dependent on our culture</h2> <p>Nevertheless, our prediction of musical events remains inexorably bound to our musical upbringing. To explore this phenomenon, a group of researchers met with the Sámi people, who inhabit the region stretching between the northernmost reaches of Sweden and the Kola Peninsula in Russia. Their traditional singing, known as yoik, differs vastly from Western tonal music due to limited exposure to Western culture.</p> <p>For a <a href="http://users.jyu.fi/%7Eptoiviai/pdf/Cognition.Yoiks.pdf">study</a> published in 2000, musicians from Sámi regions, Finland and the rest of Europe (the latter coming from various countries unfamiliar with yoik singing) were asked to listen to excerpts of yoiks that they had never heard before. They were then asked to sing the next note in the song, which had been intentionally left out. Interestingly, the spread of data varied greatly between groups; not all participants gave the same response, but certain notes were more prevalent than others within each group. Those who most accurately predicted the next note in the song were the Sámi musicians, followed by the Finnish musicians, who had had more exposure to Sámi music than those from elsewhere in Europe.</p> <h2>Learning new cultures through passive exposure</h2> <p>This brings us to the question of how we learn about cultures, a process known as enculturation. For example, <a href="https://www.musicnotes.com/now/tips/a-complete-guide-to-time-signatures-in-music/">musical time</a> can be divided in different ways. Western musical traditions generally use <a href="https://www.youtube.com/watch?v=e-CEd6xrRQc">four-time signatures</a> (as often heard in classic rock ‘n’ roll) or <a href="https://www.youtube.com/watch?v=-tn2S3kJlyU">three-time signatures</a> (as heard in waltzes). However, other cultures use what Western musical theory calls an asymmetrical meter. Balkan music, for instance, is known for asymmetrical meters like <a href="https://www.youtube.com/watch?v=b65FN-X3OkA">nine-time</a> or <a href="https://www.youtube.com/watch?v=EhVzrqvAsZI">seven-time signatures</a>.</p> <p>To explore these differences, a <a href="https://journals.sagepub.com/doi/full/10.1111/j.0956-7976.2005.00779.x">2005 study</a> looked at folk melodies with either symmetrical or asymmetrical meters. In each one, beats were added or removed at a specific moment – something referred to as an “accident” – and then participants of various ages listened to them. Regardless of whether the piece had a symmetrical or asymmetrical meter, infants aged six months or less listened for the same amount of time. However, 12-month-olds spent considerably more time watching the screen when the “accidents” were introduced into the symmetrical meters compared to the asymmetrical ones. We could infer from this that the subjects were more surprised by an accident in a symmetrical meter because they interpreted it as a disruption to a familiar pattern.</p> <p>To test this hypothesis, the researchers had a CD of Balkan music (with asymmetrical metres) played to the infants in their homes. The experiment was repeated after one week of listening, and the infants spent an equal amount of time watching the screen when the accidents were introduced, regardless of whether the meter was symmetrical or asymmetrical. This means that through passive listening to the Balkan music, they were able to build an internal representation of the musical metric, which allowed them to predict the pattern and detect accidents in both meter types. </p> <p>A <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2927013/pdf/nihms225442.pdf">2010 study</a> found a strikingly similar effect among adults – in this case, not for rhythm but for pitch. These experiments show that passive exposure to music can help us learn the specific musical patterns of a given culture – formally known as the process of enculturation.</p> <p>Throughout this article, we have seen how passive music listening can change the way we predict musical patterns when presented with a new piece. We have also looked at the myriad ways in which listeners predict such patterns, depending on their culture and how it distorts perception by making them feel pleasure and emotions differently. While more research is needed, these studies have opened new avenues toward understanding why there is such diversity in our music tastes. What we know for now is that our musical culture (that is, the music we have listened to throughout life) warps our perception and causes our preference for certain pieces over others, whether by similarity or by contrast to pieces that we have already heard.</p> <p><em>Image credits: Getty Images</em></p> <p><em>This article originally appeared on <a href="https://theconversation.com/why-certain-types-of-music-make-our-brains-sing-and-others-dont-194100" target="_blank" rel="noopener">The Conversation</a>. </em></p>

Music

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Big study shows that lowering blood pressure lowers risk of dementia

<p>A study across 20 countries has strengthened a link between lowering blood pressure, and reducing the risk of dementia.</p> <p>The meta-analysis, published in the European Heart Journal, draws on clinical trial data from 28,008 participants, to show the strongest link to date between medication that lowers blood pressure, and reduced dementia risk.</p> <p>“We know that high blood pressure is a risk factor for dementia – especially high blood pressure in midlife, so say 40 to 65 years of age,” says lead author Dr Ruth Peters, an associate professor at the University of New South Wales and program lead for dementia in the George Institute’s Global Brain Health Initiative.</p> <p>“But there has been some uncertainty about whether lowering blood pressure, especially in older adults, would reduce risk of dementia.</p> <p>“What we’ve done is take five really high-quality clinical trials and combine them into one dataset, which gave us the ability to really look at this question and look at the relationship between blood pressure-lowering tablets – antihypertensives – and dementia.”</p> <p>The five studies were all double-blind, randomised clinical trials – the ‘gold standard’ in medical research – with participants hailing from 20 different countries.</p> <p>The average age of the participants was 69, and participants were followed up an average of four years after doing the trial.</p> <p>Participants who took antihypertensives had a significantly lower chance of being diagnosed with dementia than those who took placebos.</p> <p>Dementia affects 50 million people worldwide: a number projected to triple by 2050.</p> <p>According to The Lancet’s 2020 Commission on dementia, treatment for hypertension (high blood pressure) is “the only known effective preventive medication for dementia,” all other methods of reducing your risk come from lifestyle and environment.</p> <p>“The strength of this study is the use of individual patient data in a meta-analysis of data drawn from randomised controlled trials of blood pressure medication. This is the first time such data has been meta-analysed,” says Professor Kaarin Anstey, a senior principal research scientist at Neuroscience Research Australia and the UNSW.</p> <p>“This is important for informing clinical practice,” adds Anstey, who was not involved with the study.</p> <p>Professor Nicolas Cherbuin, head of the Australian National University’s Centre for Research on Ageing, Health and Wellbeing, says that the study is “well-designed”, and reflects research by his team showing that higher blood pressure is linked to lower brain volumes and poorer brain health.</p> <p>“The diagnostic procedure and criteria used are well-established, the sample size is large, those with dementia at baseline were excluded,” says Cherbuin.</p> <p>But he points out that the study didn’t find an effect of blood pressure medication on cognitive decline, and nor did it include participants with mild cognitive impairment, who would be “more likely to convert”.</p> <p>Anstey points out that “inevitably” the participants in the cohort are now quite old, and thus may be different to populations developing dementia now.</p> <p>“Clinical trials involve highly selected samples and often exclude diverse ethnic groups,” she adds.</p> <p>“I hope that this reinforces the importance of blood pressure control for brain health,” says Peters.</p> <p>But she emphasises that, while this is useful news for preventing dementia in mid-life, people of all ages can improve their brain health by other means.</p> <p>“It’s not just blood pressure lowering – it has to be taken in the context of a healthy lifestyle.”</p> <p><strong>This article originally appeared on <a href="https://cosmosmagazine.com/health/dementia-blood-pressure-meta/" target="_blank" rel="noopener">cosmosmagazine.com</a> and was written by Ellen Phiddian.</strong></p> <p><em>Image: Shutterstock</em></p>

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