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Hall recommends Super Agers and shares his website and social links for listeners to follow.

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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