The Dr. Layne Norton Podcast Ultra-Processed Foods with Dr. Samuel Dicken
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Nov 3, 2025 Dr. Samuel Dicken, a research fellow at University College London, dives into the complexities of ultra-processed foods (UPFs). He reveals surprising findings from his randomized trial, suggesting that not all UPFs are detrimental to health. The discussion covers how consumption methods can influence effects and why a focus on whole foods remains essential. Dickens clarifies misconceptions around UPF definitions and their impact on diet. With insights on policy implications and consumer behavior, this conversation challenges conventional views on processed diets.
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From Metabolic Ward To Free-Living Evidence
- Prior metabolic-ward RCTs showed UPFs can increase energy intake and weight gain when offered ad libitum.
- Dicken's study extended that work into a free-living setting to test generalizability.
Why NOVA Labels Focus On Purpose
- Ultra-processed foods (UPFs) are defined by their purpose: industrial profit-driven processing and cosmetic additives, not direct health outcomes.
- That purpose creates characteristics (energy density, texture, cost) that often promote higher energy intake and poorer diets.
Minimally Processed Diet Led To More Weight Loss
- In a real-world 8-week crossover trial, both nutritionally improved UPF and minimally processed diets led to weight loss versus baseline.
- The minimally processed diet produced significantly greater weight loss, implicating processing-related factors beyond nutrient profiles.