92: How to Get Metabolically Flexible to Burn More Fat and Crush Your Workouts | Mark Sisson

Mark Sisson is the author of Keto For Life: Reset Your Biological Clock in 21 Days and Optimize Your Diet for Longevity. He is a former 2:18 marathoner and fourth-place Hawaii Ironman triathlete, and presides over a wide-ranging Primal enterprise, featuring the Primal Kitchen line of healthy condiments.