What's That Rash?

Епизоди

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  Eat the rainbow: what can food colour tell us? 16.09.2026 22мин

  When you're done with your weekly grocery shop, how colourful is your trolley? We know eating lots of fruits and vegetables is good for you, but colour could matter. Norman and Tegan discuss what gives fruit and veggies their hue and whether it's important when it comes to healthy eating. References: Phytonutrients: Paint your plate with the colours of the rainbow Clinical Evidence of the Benefits of Phytonutrients in Human Healthcare Eat a Rainbow – Nutrition Australia Phytochemicals: Principles and Practice What’s the Difference Between Sweet Potatoes and Potatoes? Role of Phytonutrients in the Prevention and Treatment of Chronic Diseases: A Concrete Review Major phytochemicals, their sources, active sites, and the related health benefits Effect of Fruit and Vegetable Consumption on Human Health: An Update of the Literature Adding variety to your diet lowers disease risk. But what does variety mean? Which Colour of Bell Pepper Has Most Nutrients?  If you enjoyed this episode, check these out! Should you be eating more fruit? Why Norman won't shut up about the Mediterranean diet What are the health benefits of coffee?
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  Mouthwash: good or bad for you? 09.09.2026 23мин

  How much time does your oral hygiene routine take? You brush, floss, interdent, maybe even use a tongue scraper. Is using a mouthwash going to give you any additional benefit? Or could you be doing some harm? Norman and Tegan answer questions about the effectiveness of mouthwash, what it does to your oral microbiome and why there might be a link to blood pressure. References: Oral microbiome: Unveiling the fundamentals Effectiveness of Mouthwashes in Managing Oral Diseases and Conditions: Do They Have a Role? Effect of Adjunctive Use of Commercial Daily Mouthwashes on Periodontal Health: An Umbrella Review Effect of post-brushing mouthrinse solutions on salivary fluoride retention Mouthwash Effects on the Oral Microbiome: Are They Good, Bad, or Balanced? Effects of chlorhexidine and a polyherbal mouthwash on the oral microbiome and user satisfaction: a randomized controlled trial The Effects of Antimicrobial Mouthwashes on Systemic Disease: What Is the Evidence? Oral hygiene, mouthwash usage and cardiovascular mortality during 18.8 years of follow-up Does Mouthwash Use Affect Oral Cancer Risk? A Comprehensive Systematic Review and Meta-Analysis An update on mouthwashes: advice for dental practitioners  If you enjoyed this episode, check these out! Can flossing benefit more than your teeth? How risky is sharing a toothbrush? Should you opt for aluminium-free deodorant?
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  Why wear a continuous glucose monitor? 02.09.2026 22мин

  Continuous glucose monitors, or CGMs, have transformed how people with diabetes manage their blood sugar. But in wellness circles, more and more people without diabetes are being encouraged to try these devices. Norman and Tegan get to the bottom of what these devices can actually tell you, and the potential harms. References: The wellness inspired rise of continuous glucose monitors for people without diabetes, including those with metabolic disorders – BMJ features Continuous glucose monitoring in non-diabetic populations: a systematic review of observational and interventional studies with meta-analysis  Blood glucose monitoring devices: current consideration – Australian Prescriber The Use of Continuous Glucose Monitoring to Diagnose Stage 2 Type 1 Diabetes Associations of continuous glucose monitor derived time in range and glycaemic variability with diet lifestyle and demographics Different Glucose Variability in Women With Polycystic Ovary Syndrome With and Without Insulin Resistance: A Pilot Study Understanding the benefits and psychological burdens of using continuous glucose monitoring for lifestyle change: A mixed-methods cross-sectional study Unintended Consequences: The Intersection of Diabetes Technology and Disordered Eating Risk  If you enjoyed this episode, check these out! Should we all be taking fish oil? Tonsils, appendix, gallbladder: is anything actually useless? Should you wait to swim after eating?
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  Are rest days from exercise necessary? 26.08.2026 21мин

  Not many people would argue that rest isn’t important, but how would you define a rest day? For an elite athlete a rest day could be going for a long walk. For your average person it could mean sitting on the couch. Norman and Tegan ask – why is rest important, and do you need it to make progress in the gym? References: 'No pain, no gain' debunked: Why post-exercise soreness is not essential for building muscle Skeletal muscle and resistance exercise training; the role of protein synthesis in recovery and remodeling Effects of Different Between Test Rest Intervals in Reproducibility of the 10-Repetition Maximum Load Test: A Pilot Study with Recreationally Resistance Trained Men The time course for elevated muscle protein synthesis following heavy resistance exercise Recovery and Performance in Sport: Consensus Statement Effects of Consecutive Versus Non-consecutive Days of Resistance Training on Strength, Body Composition, and Red Blood Cells Nonconsecutive versus consecutive-day resistance training in recreationally trained subjects Fatigue, pain, and the recovery of neuromuscular function after consecutive days of full-body resistance exercise in trained men Effects of Consecutive Days of Exercise and Recovery on Muscle Mechanical Function How much is too much? (Part 1) International Olympic Committee consensus statement on load in sport and risk of injury    If you enjoyed this episode, check these out! Is retirement bad for you? Do the benefits of creatine go beyond the gym? Diet vs exercise: which is more important?
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  What has your nose got to do with sleep? 19.08.2026 18мин

  Have you ever spritzed your pillow with lavender and wondered, is this actually doing anything? There are some surprising ways that smells can affect sleep, and it might have something to do with how our brains work. Norman and Tegan discuss how smells, good and bad, could affect your nightly snooze. References: From antiquity to modern hygiene: the archaeological and medicinal legacy of lavender as a promising antimicrobial agent Lavender and sleep: A systematic review of the evidence How Smell Affects Your Sleep – Sleep Foundation Reciprocal relationships between sleep and smell Subjectively intense odor does not affect dream emotions during rapid eye movement sleep Nocturnal exposure to a preferred ambient scent does not affect dream emotionality or post-sleep core affect valence in young adults Olfactory Aversive Conditioning during Sleep Reduces Cigarette-Smoking Behavior If you enjoyed this episode, check these out! Is farting a sign your gut microbiome is happy? Is melatonin the answer to a good night's sleep? Is a vibration plate worth the cost?
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  Why do we cry? 12.08.2026 20мин

  Do you feel better after a good cry, or do you feel worse than ever? There can be a lot to cry about, good or bad: a break-up, a milestone, a tragedy, a sappy movie. Norman and Tegan discuss why we evolved to cry, and the purpose it serves as we get older. References: The Riddle of Human Emotional Crying: A Challenge for Emotion Researchers The neurobiology of human crying Emotional expression in human and non-human great apes Ultra-processed food intake, cognitive function, and dementia risk: A cross-sectional study of middle-aged and older Australian adults If you enjoyed this episode, check these out! Butter vs margarine: what's better for you? How much protein do you REALLY need? Why is yawning contagious?
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  What is ultra-processed food? 05.08.2026 24мин

  You might be hearing a lot about ultra-processed foods, or UPFs, and how we should all be avoiding them. But you might be struggling with figuring out what exactly IS an ultra-processed food. Sweetened drinks, sure. What about bread? Yoghurt? Norman and Tegan unpack why it isn’t a simple question, and where the evidence stands on the health consequences. *A previous version of this episode may have implied that the Food Standards Australia New Zealand (FSANZ) board is comprised of current food industry representatives that are directly involved in setting food policy. This was edited on 12/08/2026.  References: Ultra-Processed Foods and Human Health - The Lancet series Diet quality and processed foods – Food Standards Australia and New Zealand Most of the Foods We Eat Are Ultra-Processed. Are They All Unhealthy? - Johns Hopkins Bloomberg School of Public Health Trends of obesity and underweight in older children and adolescents in the United States, Brazil, China, and Russia Ultra-processed products are becoming dominant in the global food system The UN Decade of Nutrition, the NOVA food classification and the trouble with ultra-processing Ultra-processed food exposure and adverse health outcomes: umbrella review of epidemiological meta-analyses Ultra-Processed Diets Cause Excess Calorie Intake and Weight Gain: An Inpatient Randomized Controlled Trial of Ad Libitum Food Intake The collapse of the food matrix: how ultra-processed foods impact satiety and metabolism by altering physical structure beyond nutrient composition  If you enjoyed this episode, check these out! Is gluten really the enemy? Why is everyone suddenly talking about seed oils? Why Norman won't shut up about the Mediterranean diet
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  Body hair removal: healthy or not? 29.07.2026 23мин

  The modification and removal of body hair has been going on for centuries, but our reasons for it have evolved. Some believe it’s more hygienic to remove, others argue it’s against our nature to be so hairless. Norman and Tegan trim the evidence on body hair: leg, armpit, pubic and even inside your nose. References: Trends in body hair removal as depicted through art Getting plucked: the history of hair removal - ABC Effects of pubic hair grooming on women’s sexual health: a systematic review and meta-analysis Bare necessity? Public health implications of removing pubic hair Effect of Physical and Chemical Hair Removal Methods on Skin Barrier Function in vitro: Consequences for a Hydrophilic Model Permeant Using the Hair Removal Laser in the Axillary Region and its Effect on Normal Microbial Flora Shaving of axillary hair has only a transient effect on perceived body odor pleasantness Cadaver research leads to prestigious science award - the Science Show Does nasal hair (vibrissae) density affect the risk of developing asthma in patients with seasonal rhinitis? 6 ways to remove unwanted hair - American Association of Dermatology If you enjoyed this episode, check these out! Do the benefits of creatine go beyond the gym? Does magnesium work against muscle cramps? Which hair loss treatments actually work?
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  Ashwagandha: what's the evidence? 22.07.2026 20мин

  Ashwagandha supplements are rising in popularity, but the herb has been used for hundreds of years in Ayurvedic medicine. The supposed benefits are broad – from stress to sleep, athletic performance and boosting testosterone. Norman and Tegan explore where the evidence stands, and uncertainties about potential risks. References: An Overview on Ashwagandha: A Rasayana (Rejuvenator) of Ayurveda Chemical composition, cytotoxic and pro-inflammatory enzyme inhibitory properties of Withania somnifera (L.) Dunal root extracts Chemical Composition, Biological Activity, and Health-Promoting Effects of Withania somnifera for Pharma-Food Industry Applications Clinical and Research Information on Drug-Induced Liver Injury Ashwagandha: Is it helpful for stress, anxiety, or sleep? Exploring the efficacy and safety of a novel standardized ashwagandha (Withania somnifera) root extract in adults experiencing high stress and fatigue in a randomized, double-blind, placebo-controlled trial A Randomized, Double-Blind, Placebo-Controlled, Crossover Study Examining the Hormonal and Vitality Effects of Ashwagandha (Withania somnifera) in Aging, Overweight Males If you enjoyed this episode, check these out! Vitamin C: can it cure colds and cancer? No-poo: why do we shampoo our hair? Do healthy people need lymphatic treatments?
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  How does chronic stress affect the body? 15.07.2026 22мин

  When you're going through a stressful time it can have knock-on effects on your routine. Sleep, diet, exercise routines can be thrown out of whack. And when that stress goes for weeks or months, it can have a serious impact. Norman and Tegan unpack the various forms of chronic stress, like burnout, and how they can disrupt your health. References: Chronic Stress - ScienceDirect Physiology, Stress Reaction The impact of stress on body function: A review Stressor-Specific Microbiota Intervention Stress and the gastrointestinal tract B cells and the stressed brain: emerging evidence of neuroimmune interactions in the context of psychosocial stress and major depression Stress, depression, the immune system, and cancer The effect of multiple adverse childhood experiences on health: a systematic review and meta-analysis 11 healthy ways to handle life’s stressors - American Psychological Association Stress-related conditions such as adjustment disorder and clinical burnout can be effectively treated with a 12-week cognitive behavioural programme, both when delivered as a face-to-face treatment and when delivered via the internet  If you enjoyed this episode, check these out! Why is the internet telling me to lower my cortisol? Are office jobs ruining our bodies?
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  Why do some people get motion sickness? 08.07.2026 23мин

  Sea sickness, car sickness, space sickness – when it comes down to it, it’s all the same. But not everybody suffers the same. Some people are even lucky enough to grow out of motion sickness. Norman and Tegan talk about what’s going on when the world goes topsy-turvy, and what you can do about it. References: Motion Sickness Validating sensory conflict theory and mitigating motion sickness in humans with galvanic vestibular stimulation - Nature Are evolutionary hypotheses for motion sickness "just-so" stories? Three studies of motion sickness susceptibility – Federal Aviation Authority Genetic variants associated with motion sickness point to roles for inner ear development, neurological processes and glucose homeostasis Motion sickness diagnostic criteria: Consensus Document of the Classification Committee of the Bárány Society  Survey of motion sickness susceptibility in children and adolescents aged 3 months to 18 years Hopkins History Moments: Neil A. Grauer explains how Hopkins expertise helped prevent seasickness Remedies for motion sickness: What works? - Harvard Health  If you enjoyed this episode, check these out! Why is yawning contagious? Do glasses make your eyesight worse? Is emu oil the new snake oil?
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  How to drive down your cancer risk 01.07.2026 21мин

  Lately there have been lots of scary headlines about cancer rates rising in younger adults. What can you do to drive down your cancer risk? Norman and Tegan offer some practical tips, and discuss what's in your control versus what isn't. References: Overview of cancer in Australia, 2025 - Australian Institute of Health and Welfare Effects of diets on risks of cancer and the mediating role of metabolites Be physically active – Cancer Council Exercise packs a punch in fending off cancer – the Health Report “You do not get cancer by chance”: Communicating the role of environmental causes in cancer diseases and the risk of a “guilt rhetoric”   If you enjoyed this episode, check these out! How worried should you be about microplastics? Is your (artificial) sweet tooth killing you? What's so bad about fine particulate air pollution?
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  Should you be taking calcium supplements? 24.06.2026 20мин

  Our calcium needs can increase as we age, especially for women going through menopause. Most Australians aren’t getting enough calcium from their diet, so are supplements a good option Norman and Tegan discuss the conflicting evidence on calcium – in particular, could it be good for your bones, but bad for your heart? References: Calcium supplements have 'very little place' in modern medicine - the Health Report Nutrient Reference Values - Calcium Effect of age on calcium absorption in postmenopausal women Biochemical Variables in Pre- and Postmenopausal Women: Reconciling the Calcium and Estrogen Hypotheses Calcium Content of Common Foods - Healthy Bones Australia Choosing a calcium supplement: What you should know about taking calcium to boost your nutrients Calcium Supplements and Risk of Cardiovascular Disease: A Meta-Analysis of Clinical Trials Association Between Calcium Supplementation and the Risk of Cardiovascular Disease and Stroke: A Systematic Review and Meta-Analysis Association Between Calcium Supplementation and Recurrence of Cardiovascular Events in Patients With Cardiovascular Disease: A Population‐Based Cohort Study Calcium Intake From Diet and Supplements and the Risk of Coronary Artery Calcification and its Progression Among Older Adults: 10‐Year Follow‐up of the Multi‐Ethnic Study of Atherosclerosis (MESA) Oral Calcium Supplements Associate With Serial Coronary Calcification: Insights From Intravascular Ultrasound If you enjoyed this episode, check these out! Multivitamins: Are they a scam? Don’t Die: Is Bryan Johnson going to live forever? Can peptides keep you young and buff?
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  Can tapping calm your nervous system? 17.06.2026 19мин

  There's a scene in the Devil Wears Prada 2 where a character is so stressed she starts "tapping" to calm herself down. What is this self-soothing technique, and should you try it out? Norman and Tegan talk through what Emotional Freedom Techniques, or tapping is and whether there's any evidence it lowers anxiety. References: How ‘tapping’ is dividing opinion in therapy circles Clinical EFT (Emotional Freedom Techniques) Improves Multiple Physiological Markers of Health Neural changes after Emotional Freedom Techniques treatment for chronic pain sufferers Emotional freedom techniques for treating post traumatic stress disorder: an updated systematic review and meta-analysis  Commentary: Emotional freedom techniques for treating post traumatic stress disorder: an updated systematic review and meta-analysis A Randomized Controlled Comparison of Emotional Freedom Technique and Cognitive-Behavioral Therapy to Reduce Adolescent Anxiety: A Pilot Study Food for Thought: A Randomised Controlled Trial of Emotional Freedom Techniques and Cognitive Behavioural Therapy in the Treatment of Food Cravings The impact of emotional freedom techniques on anxiety, depression, and anticipatory grief in people with cancer: A meta-analysis and systematic review  If you enjoyed this episode, check these out! Can you train yourself to sleep less? Why everything hurts when you turn 30 MSG's messy myths and racist tropes
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  Is farting a sign your gut microbiome is happy? 10.06.2026 18мин

  Everyone wants a healthy gut, and your microbiome plays a big role in keeping you well. So how do you know your microbiome is in top shape? Are there stinky signs that things are going right, or wrong? Norman and Tegan breeze through the research in this live recording at the World Science Festival Brisbane. References: The Invisible College of Experimental Flatology Explainer: The chemistry of farts A widespread hydrogenase supports fermentative growth of gut bacteria in healthy people Intestinal gas production by the gut microbiota: A review Association of the Gut Microbiota With Cognitive Function in Midlife  Gut microbiome predicts cognitive function and depressive symptoms in late life  The Relationship between Gut Microbiome and Cognition in Older Australians  Chart Your Fart - CSIRO If you enjoyed this episode, check these out! Why is yawning contagious? Why are some people right (or left) handed?
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  Still coughing — are you still infectious? 03.06.2026 18мин

  Cold season is upon us, so it’s no wonder you’re side-eyeing that person coughing on the bus. But does a cough mean someone is still infectious? How do you know you’re in the clear to go back to work? Norman and Tegan talk through the science, and also how attitudes have changed since the COVID-19 pandemic. References: How Long Does a Cough Last? Comparing Patients’ Expectations With Data From a Systematic Review of the Literature Acute cough in outpatients: what causes it, how long does it last, and how severe is it for different viruses and bacteria?  Estimating influenza latency and infectious period durations using viral excretion data Duration of viral infectiousness and correlation with symptoms and diagnostic testing in non-hospitalized adults during acute SARS-CoV-2 infection: A longitudinal cohort study How the pandemic shaped presenteeism trends between healthcare and non-healthcare workers using the Korean working conditions surveys (2010–2023)  Sickness Presenteeism in the Aftermath of COVID-19: Is Presenteeism Remote-Work Behavior the New (Ab)normal?  Over‐the‐counter (OTC) medications for acute cough in children and adults in community settings Comprehensive evidence-based review on European antitussives If you enjoyed this episode, check these out! Is it OK to exercise when you're sick? Are office jobs ruining our bodies? Should you add snail slime to your skincare routine?
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  Can your joints predict the weather? 27.05.2026 19мин

  Have you heard the phrases, "aches and pain, coming rains" or about "ill health due to evil winds"?  Many people believe they can feel a change in weather coming on because pain flares in their joints.  Norman and Tegan unpack what could be going on, and whether it's backed by scientific evidence.  References: Associations between weather conditions and osteoarthritis pain: a systematic review and meta-analysis  Come rain or shine: Is weather a risk factor for musculoskeletal pain? A systematic review with meta-analysis of case-crossover studies Cloudy with a chance of pain: How the weather affects the pain of citizen scientists using a smartphone app  Temperature extremes causing gout flare hospitalisation Can aching joints really predict the weather? Exploring the science behind the stormy debate  What triggers weather-related joint pain? - Harvard Health If you enjoyed this episode, check these out! You'll catch your death! Does cold weather cause colds? Can consuming dairy really give you acne? How risky is sharing a toothbrush?
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  Should you get a full-body MRI? 20.05.2026 22мин

  It’s good to be on top of your health – but how far would you go to ensure you’re staying healthy? Ads have popped up for full-body MRIs, promising to catch things from cancer to aneurysms. Norman and Tegan scan through the potential benefits and risks of looking inside seemingly healthy bodies.  References: Principles of screening - Cancer Council Incidental Findings and Low-Value Care Prevalence of abnormalities in knees detected by MRI in adults without knee osteoarthritis: population based observational study (Framingham Osteoarthritis Study) Whole‐body MRI for preventive health screening: A systematic review of the literature The effects of incidental findings from whole-body MRI on the frequency of biopsies and detected malignancies or benign conditions in a general population cohort study Clinical value of whole-body magnetic resonance imaging in health screening of general adult population Long-Term Psychosocial Consequences of Whole-Body Magnetic Resonance Imaging and Reporting of Incidental Findings in a Population-Based Cohort Study  Impact of whole-body MRI in a general population study Elective MRI Screening of the General Public—Buyer Beware If you enjoyed this episode, check these out! At-home DNA tests — what can they tell you? Do glasses make your eyesight worse? Can functional mushrooms really help treat cancer?
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  Deep dive on progressive exercise 13.05.2026 22мин

  You might've heard the qualifier that exercise is good for you – but you need to be progressing that exercise over time. Running further, lifting heavier, exercising for longer. How important is it to up the stakes? Norman and Tegan flex their muscles on progressive training and its benefits. References: Thomas L. DeLorme and the Science of Progressive Resistance Exercise Associations of Muscle Mass and Strength with All-Cause Mortality among US Older Adults Skeletal Muscle Strength as a Predictor of All-Cause Mortality in Healthy Men  Progressive overload without progressing load? The effects of load or repetition progression on muscular adaptations  Strength and Hypertrophy Adaptations Between Low- vs. High-Load Resistance Training: A Systematic Review and Meta-analysis  Physical activity types, variety, and mortality: results from two prospective cohort studies  If you enjoyed this episode, check these out! Working out? Why 'No Pain No Gain' is bull Is a vibration plate worth the cost? You'll catch your death! Does cold weather cause colds?
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  Hantavirus: what we know about the cruise ship outbreak 11.05.2026 13мин

  A cruise ship at the centre of a virus outbreak — sound familiar? Passengers and crew are beginning to disembark the MV Hondius after several cases of hantavirus sent them into quarantine.  The virus is usually caught through contact with infected rodent urine, droppings or saliva. Transmission between humans is rare.  Norman and Tegan answer common questions about the hantavirus, and how it compares to the handling of COVID-19.