Finding Mastery with Dr. Michael Gervais Why You’re Tired, Anxious & Inflamed I Dr Tim Spector
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Feb 11, 2026 
Dr. Tim Spector, epidemiologist and gut microbiome pioneer behind TwinsUK, explains why missing fiber and microbial diversity—not just calories—may drive tiredness, anxiety, and inflammation. He discusses problems with ultra-processed foods, why diverse plants and fermented foods matter, and practical shifts like time-restricted eating and choosing whole, fiber-rich foods.
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Calories Mislead; Food Quality Controls Hunger
- Calories are a poor guide; food quality and how foods affect hunger matter far more for weight control.
- Ultra-processed, low-calorie foods trigger overeating by 25% and ramp up hunger signals over time.
Dodge Hyper‑Palatable Ultra‑Processed Foods
- Avoid ultra-processed foods that are hyper-palatable, contain additives, and melt in your mouth; they promote overeating.
- Scan ingredient lists and prefer items you could make in a home kitchen.
Microbiome: A New Chemical Factory
- The gut microbiome acts like a newly discovered organ producing chemicals vital for immunity, metabolism, and the brain.
- Microbial diversity requires diverse, fiber-rich plant foods as fuel.
