I am starting my fourth Water Fast today. All my previous fasts were 3-5 days and after that I just tend to run out of energy and willpower completely (i'm a very skinny guy). I've been a strict vegetarian for 3 years and been taking herbs and superfoods and things like Iodine for a long time...recently did a Liver Flush but nothing came out. I'm doing the fast because I feel that my digestive system and my liver need a rest..I also feel the best when I haven't eaten for a while so that may be a sign that my body needs a rest. I'm not sure how far this fast will go but I'm aiming for at least 4 days and I hope that I don't run out of energy quickly....Wish me luck!