I have a friend who’s trying to lose weight by fasting - he has an app and everything! Last week he was saying he felt faint but he wasn’t going to eat anything because his 27 hour fast wasn’t up yet. I told him that he wasn’t doing himself any good. That fasting was a gimmick. That not eating for a whole day and then eating some out of date frozen peas and a family-sized tub of banana ice cream was ridiculous. And that I know a highly qualified person on the internet (you) who said it was stupid. He did listen and has stopped.