Do you need to balance your hormones? Is collagen worth buying? And can years of dieting really damage your metabolism? In this episode of Discovering Nutrition, Eliisa sits down with registered dietitian and nutrition researcher Kevin Klatt, PhD, RD, an assistant professor at the University of Toronto, to unpack the nutrition and wellness claims filling our social feeds. Kevin explains how he evaluates evidence, why a convincing biological explanation doesn’t establish that a treatment works, and why uncertainty belongs in honest health advice. He also shares his perspective as a researcher and someone navigating an autoimmune condition. Together, they discuss hormone balancing, perimenopause, protein and fibermaxxing, diet soda, collagen supplements, gut-healing claims, food-sensitivity tests, metabolic adaptation, and anti-inflammatory diets. They also explore MTHFR and prenatal vitamin claims, pregnancy nutrition anxiety, food guilt, and the role of nutrition tracking. Whether you’re choosing supplements, making sense of conflicting advice, or trying to feel more at ease with your food choices, this episode offers a candid and funny conversation about what we know, what we’re still learning, and how to keep wellness promises in perspective. Watch more episodes of Discovering Nutrition on YouTube, or listen on Spotify, Apple Podcasts, and your favourite podcast platform. Guest: Kevin Klatt, PhD, RD Assistant Professor, Department of Nutritional Sciences, University of Toronto Faculty profile Instagram: @kcklatt Kevin’s writing Key Notes What hormone-balancing claims mean and why specificity matters. What fiber and estrogen research can tell us about menopause claims. Why protein and fiber targets need the context of the whole diet. Why mouse studies don’t automatically translate into human diet advice. Kevin’s perspective on diet soda, collagen, and supplement priorities. Questioning gut-healing promises and commercial food-sensitivity tests. Metabolic adaptation and claims of permanent damage from dieting. Inflammatory markers versus improvements in symptoms and quality of life. MTHFR, prenatal marketing, and fear around pregnancy nutrition. Using tracking alongside flexibility and enjoyment of food. Timestamps: (00:00) Your Biggest Nutrition Questions (00:32) What Does Hormone Balancing Mean? (04:33) Perimenopause, Symptoms & Finding Good Care (07:59) Fiber, Estrogen & Menopause Claims (15:26) Women’s Health Research & Wellness Sales Pitches (17:26) Proteinmaxxing & Fibermaxxing (25:08) Mouse Studies & Human Nutrition Advice (32:49) Why Nutrition Is So Hard to Study (42:07) How Much Flexibility Is There in a Healthy Diet? (46:52) What Kevin Actually Eats (52:30) Food Guilt & Trying to Eat Perfectly (55:55) Tracking, Wearables & Health Habits (59:02) Diet Soda: What Does the Evidence Say? (01:03:03) Collagen Supplements, Skin & Protein Goals (01:08:40) Can You Heal Your Gut? (01:12:44) Food-Sensitivity Tests & Getting Support (01:20:35) Can Dieting Damage Your Metabolism? (01:24:49) What Does Anti-Inflammatory Mean? (01:37:15) Turmeric & Weighing Supplement Claims (01:40:35) MTHFR, Folic Acid & Prenatal Claims (01:46:11) Pregnancy Nutrition & The Pressure to Be Perfect (01:53:05) Heavy Metals, Fear & Your Social Feed (01:56:27) Where to Find Kevin & His Research