eli5: why is it so difficult to go a week without eating when we have 10s of thousands of calories worth of body fat?
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I have gone for a week without eating on two occasions. Once as a religious fast, another as part of testing the waters of longer than intermittent fasting. Keeping in mind that I did research ahead of time to know how to do it while staying healthy, I mostly just took an electrolyte supplement, and can say that it really is not hard at all. Day two is kind of annoying, but after that day 3 was easier than late day 1, and it really didn’t ever feel any harder. I looked forward to breaking the fast, but I did not feel hungrier than a normally long wait between meals. There’s even someone who [fasted for over a year](https://en.wikipedia.org/wiki/Angus_Barbieri%27s_fast).
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