I'm doing 20h/4h for almost 2 years now. Which means i eat one meal a day, but that is split into two, first i eat around 11AM then around 2-3PM then 20 hours fasting. Most people thing that's insane, but the reality is, once you're done eating at 2PM, you don't have to think about food anymore for the rest of your day. "Ohh no, what am i gonna eat for dinner or for breakfast?", this is irrelevant. I've lost 10kg in 6months, without any real struggle. Now days i have a cheat day every 1 or 2 weeks, but i'm in a weight maintaining mode now. If i want to lose more weight, i have to switch into "strict mode", in general the amount of food i eat has a calorie deficit. On top of this i take vitamin supplements just to make sure i have enough, since i eat less.