Why Weight Loss Fails — The Rich Roll Podcast (Kevin Hall, PhD)
Update: 2025-12-19
Description
Biology fights back: appetite and metabolic adaptation make sustained weight loss far harder than willpower alone. In this 5-minute condensation of a 2-hour conversation, host Rich Roll and metabolic scientist Kevin Hall, PhD, unpack why resting metabolism slows during weight loss, why appetite increases far more than energy expenditure falls, and how the modern food environment and ultra-processed foods exploit those biology-driven vulnerabilities. You’ll learn the role of metabolic adaptation, why calories-in/calories-out is necessary but not sufficient, practical steps (move more, lower energy density, favor whole foods), and why policy-level research infrastructure matters. Topics include weight loss, metabolism, ultra-processed foods, appetite control, and food environment. Listen now to get the key ideas in minutes.
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