Man, I had to stop taking this after only three days, because I just couldn't bare it any longer. The heat is very, very, very uncomfortable. I think instead of 8 on/8 off I'm going to utilize the 3 day approach that other's have used before starting w/ a higher dose and working down. I heard it's more bearable and even possibly more effective. Probably won't do this but once every other week or so. By the way, lost 5 lbs in three days. Kinda scary!