Mark Sisson on Metabolic Flexibility, Alcohol, Fiber, and the Real Secrets to Longevity
- Arantza Romero
- Jul 22
- 2 min read
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Apple Podcasts // Spotify // CastBox // Overcast
Mark Sisson, 72 and still shredded, returns to Peak Human for a powerful conversation on what real healthspan looks like — not chasing 180 years with futuristic tech, but thriving into your 90s with energy, strength, and vitality. As the founder of the Primal Blueprint, Mark brings decades of wisdom on metabolic flexibility, minimalist training, and practical ancestral living.
In this episode, Brian and Mark discuss how to optimize metabolism, how to train smarter (not harder), the real deal with fiber, alcohol, hydration, and carbs — and why metabolic flexibility is the key to enjoying life without strict rules, guilt, or orthorexia.
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SHOW NOTES:
02:00 The Primal Blueprint and 25 Years of Low Carb Living
04:00 Minimum Effective Dose – Why Mark Hates Overtraining
11:30 Redefining Metabolic Flexibility
14:00 Burning Carbs and Fat – The Joy of Not Being Rigid
18:00 Why Unsustainable Diets Always Fail
20:30 The European Bread Exception – Healing the Gut for Freedom
24:00 Alcohol, Red Wine & the Spectrum of Acceptable Foods
27:30 Fiber is Overrated – Healing IBS with Collagen & Meat
34:00 What Stool Really Is – Busting Fiber Myths
39:00 The Problem with Sugar Diets & Misguided Trends
44:00 You’re Not Dehydrated – The Hydration Hype Exposed
49:00 Do We Really Need Electrolytes All the Time?
52:00 Sunlight: Powerful, But Not Without Risk
For full show notes with links to all the studies join the Patreon
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Film site: http://FoodLies.org
YouTube: https://www.youtube.com/c/FoodLies
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