BTW, I feel I must add (for the benefit of random readers stumbling upon this thread) that most people should not attempt long-duration fasting. It may not be b

BTW, I feel I must add (for the benefit of random readers stumbling upon this thread) that most people should not attempt long-duration fasting. It may not be beneficial at all, and there are certain dangers associated with it. Up to 3 days is probably okay if you're overall healthy, but most people should stop around this point (I can't draw a firm line as it's not an exact science). 1 week becomes pretty sketchy for everyone. The human body could go on like that for a few weeks actually, but I don't think there are any benefits beyond 2...3...4 days [research needed], and the dangers multiply rapidly the more you push into very long durations.