Metabolic HealthMetabolic Flexibility, Zone 2 Training, and Reversing Type 2 Diabetes Explained
This masterclass episode of The Proof brings together six researchers — including Dr Iñigo San Millán, Professor Roy Taylor, and Dr Kevin Hall — to unpack metabolic health from the cellular level up. The conversation covers why mitochondria are central to metabolic flexibility, how lactate functions as a fuel and signaling molecule rather than a waste product, and what chamber studies reveal about calorie equivalence. Professor Taylor's twin cycle hypothesis explains how type 2 diabetes develops through hepatic and pancreatic fat accumulation and why significant weight loss can reverse it. The personal fat threshold concept challenges BMI as a reliable health marker. Zone 2 training is examined as the most effective stimulus for mitochondrial biogenesis, with practical guidance on identifying the right intensity. The episode closes with actionable biomarker tests and movement strategies applicable to everyday life.
