I haven't tried it, but my dad did a no-consumption (or whatever you call it) fast for two and a half weeks (no food or water, basically any consumption by mouth). (EDIT: Apparently it's called
breatharian) He said he felt great (he did seem a lot more energetic), but then we went to California for vacation, and my aunt always cooks the best meals so he started eating again. :P I might try it sometime though; apparently you can go for years. I know a couple who hasn't eaten or drunk for three years. Because their digestive system is pretty much freed up, neither of them needs to sleep for more than a few dozen minutes a day, and they don't sweat at all (we took a rollerblading trip in the hot sun all day once, and not a drop; it was quite amazing). I don't think I would advise it if you don't know what you're doing, though. Apparently some woman in Hungary dropped dead trying to not eat or drink at all.
