The Proof with Simon Hill

Dr Lora Giangregorio, a Tier 1 Research Chair in Bone Health and Exercise Science, explains practical ways to train for stronger bones and better balance. She discusses why starting where you are matters. She outlines the three pillars: balance, resistance, and impact training. She covers progressive overload, effort over absolute weight, and safely introducing impact work.

Dr Ty Beal, a global nutrition scientist working on nutrient access and policy. Dr Christopher Gardner, a Stanford nutrition researcher who ran major diet trials and served on the Dietary Guidelines committee. They debate ultra-processed foods, protein needs and aging, plant-based meats versus conventional meat, fortification and equity, and how evidence and messaging shape national dietary advice.

Dr Kristen Knutson, a sleep and circadian researcher who chairs the American Heart Association statement on circadian health. She explores how morning light, meal and exercise timing, and regular sleep schedules shape metabolism and cardiovascular risk. The conversation covers light therapy, melatonin timing, wearables' limits, and practical tips for handling overnight awakenings.

Dr Alyssa Olenick, exercise physiologist and coach for midlife women, and Dr Lauren Colenso, clinician focused on strength and longevity. They cut through the noise on resistance training, realistic cardio, simple full‑body lifting templates, how to gauge effort, protein and dieting basics, and practical ways to progress strength without perfection.

Alan Aragon, evidence-based nutrition researcher who simplifies protein and diet for trainees. Dr Brad Schoenfeld, hypertrophy scientist and former bodybuilder studying muscle and training. They discuss protein targets, recomposition versus surplus, effort and failure in training, recovery strategies, cardio-resistance balance, and practical training frequency to preserve muscle with age.

Dr David Katz, preventive medicine physician and public health expert, takes on the 2025 US dietary guidelines. He critiques political influence over science. He debates the push for more animal protein, contradictions around saturated fat and full-fat dairy, and confusions about seed oils. He returns to a simple refrain: real food, mostly plants, in balanced combinations.

A deep dive into whether diet can halt or reverse atherosclerosis. Short rundowns of six randomized trials comparing Mediterranean, low fat, and intensive lifestyle approaches. Explanations of how plaque is measured and which plaque types change with diet. Clear practical takeaways on timing, food quality, and combining medications with lifestyle for heart health.

Dr Robert Eckel, endocrinologist and former American Heart Association president, unpacks why obesity is more than BMI. He explains visceral versus subcutaneous fat and how adipose-driven insulin resistance develops. The conversation covers who benefits from weight loss, GLP-1 therapy questions, and practical ways to monitor metabolic risk.

Dr Natalie Crawford, board-certified OBGYN and reproductive endocrinologist who turned personal loss into patient-focused care. She discusses how sleep, inflammation, insulin resistance, and strength training shape egg and sperm health. Nutrition, key supplements, toxin avoidance, and realistic use of IVF or egg freezing are covered in practical, science-forward terms.

Dr. Karen Corbin, a registered dietitian and expert in nutrition and the gut microbiome, dives into how gut microbes can influence calorie absorption. She reveals that diet composition affects energy balance and discusses the fascinating concept of 'lost' calories due to fecal energy loss. Karen offers practical dietary tips to enhance microbiome health, emphasizes the importance of fiber, and clarifies the differences between probiotics and prebiotics. She also touches on future microbiome research and the potential of diet in personalizing metabolic health strategies.