Well, depends on the person. Angus Barbieri was able to maintain a 0-calorie diet for over a year, losing 125 kg in the process. Not, perhaps, a feat to be emul

Well, depends on the person. Angus Barbieri was able to maintain a 0-calorie diet for over a year, losing 125 kg in the process. Not, perhaps, a feat to be emulated, but obviously physically possible. https://en.wikipedia.org/wiki/Angus_Barbieri%27s_fast https://en.wikipedia.org/wiki/Angus_Barbieri%27s_fast