Worked great for my boy who tried it. He lost somewhere in the park of 13-16lbs in three weeks. I shit you not, prolly chemistry, he was real strict though. Whenever he would eat carbs, one bite and it would make him full, just from not eating them on a regular basis. He has been off for a couple of weeks now, and says the pounds are coming back fast and he is even watching what he eats. I think it would help if he excercised a little bet though...lol