The Role of Carbohydrates in Fatigue

There was an interesting subsection in your book on low carb fatigue. Do you see any role for low carb or keto diets even done temporarily or cyclically to have benefits or do you see them mostly as a potential problem? You know, if you show me good data, I'll believe anything at all. And there's countless ways that one can speculate about big outcomes or big benefits about ketone bodies.