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In this episode of The Ready State Podcast, we’re joined by Dr. Kevin Hall—one of the world’s leading metabolism researchers and a longtime NIH scientist—for a wide-ranging conversation on what the research actually says about weight loss, energy balance, and the modern food environment.
Dr. Hall explains what we’ve learned from real-world and tightly controlled studies, including his work following The Biggest Loser contestants, and why exercise doesn’t fully prevent the metabolic adaptations that can accompany major weight loss. We also unpack why “calories in, calories out” is both true in principle and often misunderstood in practice, how ultra-processed foods can drive overeating, and what GLP-1 medications may be changing in appetite biology.
The episode also touches on Dr. Hall’s departure from a 21-year career at the NIH, following the censorship of his team's findings on ultra-processed foods when they didn’t align with preferred narratives—an experience he describes as chilling for scientific communication.
Finally, we explore the practical challenges of doing high-quality nutrition research, why confident opinions can outpace the data, and what it will take to better understand—and ultimately prevent—diet-related chronic disease.
What You'll Learn in This Episode- Why metabolism isn’t “broken” — and why larger bodies burn more calories at rest
- What the Biggest Loser study actually revealed about weight loss and regain
- Why exercise doesn’t “save” your metabolism during extreme dieting
- How ultraprocessed foods change how much people eat — without acting like addictive drugs
- Why calories in vs. calories is often misunderstood in practice
- How genetics and environment interact to shape body weight
- What GLP-1 drugs are really doing — and what they don’t fix
- Why nutrition science is underfunded, politicized, and desperately needed
Chapters(00:00) - Kevin Hall, PhD, Metabolism Researcher (01:01) - Dr. Hall on the Ready State Podcast (04:10) - Misconceptions About Metabolism (04:54) - The Biggest Loser Study & Metabolism Influence (13:09) - Challenges in Nutrition Research (19:10) - Metabolism's Role in Weight Loss (22:13) - Vitality Blueprint: Importance of Blood Work (25:45) - Calories In, Calories Out: Simplistic View? (30:45) - Understanding GLP-1 Agonists (32:20) - The Food Environment's Impact (36:05) - Ultra-Processed Foods and Caloric Intake (38:02) - The Complexity of Obesity (41:40) - Solutions for Our Food System (48:23) - Causes of Brain Fog (49:34) - Element: Nutritional Insights (51:39) - RFK Jr. Discussion (01:01:40) - Politics' Influence on Science (01:04:35) - Leaders in Nutrition Science (01:06:48) - Can Weight Loss Be Achieved? (01:08:10) - Universal Diets: Myth or Reality? (01:12:35) - Why Doritos Lead to Overeating (01:13:21) - Understanding Visceral Fat (01:14:04) - Momentous: Nutritional Products (01:20:25) - Book/TV Show/Music Recommendations (01:21:11) - Connecting with Dr. Hall (01:21:52) - Outro
Connect with KevinWebsite | Bluesky | X | LinkedIn Book: Food Intelligence: The Science of How Food Both Nourishes and Harms Us Check out The Biggest Loser Study 2019 Study: Ultra-Processed Diets Cause Excess Calorie Intake and Weight Gain
Huge thanks to our sponsors, Vitality, Momentous, and LMNT. |
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