Fasting (and all calorie restriction really) has well established links to longevity. You can look up the research of people like Valter Longo (he’s a bit of a quack that peddles a diet, but his actual research is sound and often includes summaries of the longevity research).
Look up “Autophagy” (newly discovered) and you’ll have your answer, Re: Fasting. Is it the fountain of youth? Dr. Jason Fung speaks about the effects of it and so do numerous others. Here’s the key: Autophagy is experienced on a smaller scale while eating OMAD. Much more inense with int. fasting (IF) but add this: the longer you go, the more HGH is produced, which def makes one not just look younger but adds longevity bc your body clock is turned back.
I have been doing it for a few weeks. I went to the doctor this week and I paid the girl and was sitting alone in the waiting room and she pops out from behind the desk to say, “I hope you don’t mind me saying this but you look a lot younger than you age” - of course I don’t mind her saying that. I thanked her… but this is the second time someone said that this year.
There is a lot of evidence about longevity and fasting, just I agree stay away from Longo.