Eating 2/3 of a plate generally speaking isn’t a bad idea, and dietary science has advanced since the 1980s to the point where we now know the body can produce fat from dietary intakes other than actual fat.

In fact, a high fat, low carb diet like a plate of 2/3 meat and cheese plus some veggies, is a great way to improve one’s gut biome.

My own anxiety and depression basically disappear when I keep my carb intake below 120 grams a day.