[voisin]

> ketosis was the primary metabolic status for our ancestors for millions of years

Due to food scarcity, not due to abundance of protein sources. The current keto diet is light on fasting and heavy on chicken and steak, which I think is the “fad” portion of OP’s comment. There are tons of negative things about jacking of animal protein intake that do not exist in a fasting focused keto diet.

[keybored]

All of our habits post-Agricultural Revolution (like grain) have been a fad in evolutionary terms.