Not my experience. I eat one meal a day and I don't really get work going before that meal (which is usually around noon).

It's not even that I feel particularly hungry (unless I ate less than usual yesterday), peak of hunger is usually somewhere before I go asleep, I just feel a bit lethargic.

I only get "brain fog" some time after eating a lot of sweet or otherwise easily accessible sugars

> Anyway, I'm surprised this article (study?) didn't take into account "meeting fatigue". I know that for myself, after an hour in a meeting, I just want to get out so I can recharge. I know nothing productive will happen until I do so.

I swear I feel way more drained after a day of meetings than a day of brain work...