@Stahesh i know there was one that did it for more than a year. not sure if this one or not(name does not sound familiar). anyway, he was under observation and had to take electrolytes but otherwise no food. longest i did was a week. a friend of mine did 3 weeks.in the end, your body balances itself to match your calories intake and expenditure so it's kinda pointless. but good to discover what you can do and how much information is just garbage. would be though not being keto-adapted though.