Heres an ex of very cool guy Alex Hannold - climber, who is eating simple and use not a lot of suppl. Diet in this video: musli, almond milk, raspberries, bananas, macaroni and cheese, some energy bars, some suppl with least additives.
Regarding protein he said most of the population is poor to have eaten a lot of protein anyway and they are relatively healthy.
Working out 6 days out of 7 like full time occupation. Could not hear anything about testing and so on, he even said that he wasnt gifted at young age as were some other guys around him.