I haven't done a fast since adolescence and that was a dry one.. I am 22 and 164 pounds and 5ft6in and had my last meal at 7:30 tonite. I am beginning a Water Fast now and plan to do it for 7-10 days. I'll reply after the first 36 hours. Wish me luck, I want to lose 15-20 pounds. This forum has given me some nice insight.