In my personal experience, optimal nutrition creates what I would, in jest, refer to as "superpowers". When I compare my mental and physical state under optimal conditions to under poor conditions, there is a dramatic difference in me.

This, to me, is also why for many athletes, their performance doesn't begin on the field but rather it begins with their food intake.

I don't trust the data he provided because it isn't rigorous, reviewed or even analyzed at all.

But I'm curious, regardless.