@Stahesh - My longest fast was about 6 weeks.
More accurately, it was a liquid diet. I drank plenty of juice, and I did have about one meal a week (cheeseburger). This was while on active duty stateside.
I stopped after I noticed I my weightlifting capacity dropping. I can't really remember why I did that... 🤔😂 probably some combination of depression and curiosity. 😅