Sigma Nutrition Radio
Discussions about the science of nutrition, dietetics and health. The podcast that educates through nuanced conversations, exploring evidence and cultivating critical thinking.
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Sep 15, 2026 · 58 min#620: BPC-157 and Peptide MedicationsDr. Jordan Feigenbaum looks at the evidence behind BPC-157 and other peptide products, including claims about injury recovery and tissue repair, plus safety and regulatorSep 8, 2026 · 1h 3m#619: Fish Intake RecommendationsDanny Lennon and Alan Flanagan trace where the one-to-two-servings-a-week fish guideline came from, why studies seem to contradict each other, and what substitution analySep 1, 2026 · 57 min#618: Wellness Culture and Science CommodificationDr. Nick Tiller discusses how scientific language gets used to dress up selective evidence, and how problems inside academia turn tentative findings into confident claimsAug 25, 2026 · 47 min#617: Effective Athlete SupportGemma McGuinness talks through practical nutrition coaching for athletes, with a focus on flexible routines, athlete autonomy and support that lasts beyond rigid meal plaAug 18, 2026 · 21 minSNP53: Fiber Benefits AnalysisA premium preview asking whether fiber has health benefits of its own or mostly acts as a marker for a diet high in whole foods.Aug 11, 2026 · 1h 15m#616: Medical Screening HarmsDr. Austin Baraki explains how screening tests can produce false positives and overdiagnosis, and why results should be read probabilistically with shared decision-makingAug 4, 2026 · 56 min#615: Why Processing Doesn't Determine the Healthfulness of Plant-Based Diets – Alysha Thompson, PhDWhat does the evidence actually show when we look at plant-based dietary patterns through the lens of food processing? And does classifying foods as "ultra-processed" meaJul 21, 2026 · 57 min#614: The Human Skills of Nutrition Coaching – Krista Scott-Dixon, PhDIn nutrition and health coaching, one of the central challenges is understanding how people actually change, particularly when life is complex, motivation fluctuates, andJul 14, 2026 · 57 min#613: Supplement Safety & Medication Interactions – Giulia Guerrini, MPharmSupplement safety is often discussed in very general terms, but in practice the risks depend heavily on the individual. A supplement that is reasonable for one person mayJul 7, 2026 · 39 min#612: Does Sweet Taste Exposure Actually Develop Preference? – Prof. Katherine AppletonA common idea is that repeated exposure to sweet taste strengthens our preference for sweetness, which then drives greater intake of sweet foods and drinks. This idea is Jun 30, 2026 · 55 min#611: Electrolyte Mythology: Wellness Marketing vs. Evidence - Zoë Rom & Kylee Van HornElectrolytes have become one of the most heavily marketed areas of modern sports nutrition and wellness. What was once a relatively specific tool for certain endurance atJun 23, 2026 · 13 minSNP51: Understanding Blood Glucose ReponsesThis is a Premium-exclusive episode. Go to the Premium feed to listen. Or subscribe to Premium. Blood glucose is easy to measure, but not always easy to interpret. This PJun 16, 2026 · 57 min#610: Rock, Paper, Salmon – Errors in Interpreting Food Substitution ModelsWhen considering the health impact of foods, it is important to consider "compared to what?". Increasing the amount of a certain food or nutrient in the diet, typically iJun 9, 2026 · 1h 10m#609: Unprocessed Red Meat & Cancer RiskUnprocessed red meat and cancer risk remains one of the most debated topics in nutrition science, partly because the evidence is often presented in overly simplistic termJun 2, 2026 · 1h 8m#608: Performance Nutrition in Elite Rugby – James Morehen, PhDPerformance nutrition in elite sport is often discussed in terms of meal plans, supplements, and macronutrient targets. However, effective practice in professional enviroMay 26, 2026 · 51 min#607: Gut Health & Microbiome Testing: What Evidence Do We Actually Have? – Emily Leeming, PhDGut health has become a major focus in nutrition, medicine, and consumer wellness, but the term is often used loosely. Claims about microbiome testing, probiotics, fermenMay 21, 2026 · 19 minPMOS (PCOS) and Diet: What Can Nutrition Realistically Do? - SNP#50In this episode, we examine what nutrition can realistically do in the condition historically known as PCOS, now renamed polyendocrine metabolic ovarian syndrome, or PMOSMay 19, 2026 · 41 min#606: Practical Nutrition Strategies for Fat Loss – Luke HannaBody composition goals, particularly bodyfat loss, are among the most common reasons people seek support from a nutritionist or health and fitness professional. While theMay 12, 2026 · 56 min#605: Fasting, Nutrient Timing & CGMs: Interpreting the Evidence – Prof. James BettsFasting, nutrient timing, chrono-nutrition, and continuous glucose monitoring are all topics that have generated substantial interest, but they are also areas where exaggMay 5, 2026 · 52 min#604: How To Interpret Nutrition Research – David Allison, PhDHow should we decide what counts as trustworthy evidence? Scientific rigor is not a single characteristic of a study, but a chain of decisions made from the moment a quesApr 28, 2026 · 59 min#603: Should Dietary Fiber Be Considered Essential? – Andrew Reynolds, PhDDietary fiber is widely recognized as an important component of a healthy diet, yet it is not typically classified as an essential nutrient. In this episode, Dr. Andrew RApr 21, 2026 · 50 min#602: Avoidant/Restrictive Food Intake Disorder (ARFID) – Megan Hellner, DrPH, RD & Katherine Hill, MDAvoidant/Restrictive Food Intake Disorder (ARFID) is an eating disorder diagnosis characterized by a persistent restriction or avoidance of food intake that results in clApr 14, 2026 · 53 min#601: Gallstones & Gallbladder Conditions: Impact of Diet – Angela Madden, PhD RDThis episode examines what we actually know (and importantly, what we do not know) about diet in relation to gallstones and gallbladder conditions. Much of the public-facApr 7, 2026 · 22 minCoevolution With Foods? Multivitamins? Eating Too Early? – Ask Me Anything (SNP49)In this episode, Danny answers questions submitted by Premium subscribers. Questions Answered in This Episode: [00:05:13] Is eating too early (relative to chronotype) metMar 31, 2026 · 2h 0m#600: Finite Knowledge, Infinite Ignorance"The more we learn about the world, and the deeper our learning, the more conscious, specific, and articulate will be our knowledge of what we do not know, our knowledge
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