The phenomena isn't limited to Kenyans. Top runners around the world have that kind of diet. You're not going to find a "proper" experiment, but many, many ath

The phenomena isn't limited to Kenyans. Top runners around the world have that kind of diet. You're not going to find a "proper" experiment, but many, many athletes experiment with their diets, and ketogenic diets are pretty well explored ground. Athletes and coaches alike gravitate towards what yields results. Running is an extremely competitive sport with few barriers to entry and the claim of such a low-hanging "massive competitive advantage" is an extraordinary one that requires extraordinary evidence to be taken seriously.