It might surprise you (pleasantly or horrifically lol) to learn that there’s a large group of people specifically doing one meal a day (referred to as OMAD) as a form of hardcore intermediate fasting.

That being said, they make sure they get the proper amount of calories/macros in for this (they’re not just eating a slice of bread and butter), so I understand that you’re not referring to this style of eating.

Still wanted to bring it up though. Wild stuff.