I've been curious about all the slimming pills out there. From what I have read, very few do anything good and most are useless at best. I'm sure it works for you but the only thing I've read that is close to being proven to work is Protein powder followed by multi vitamins. I take protein powder in shakes and it feels like it helps recovery from exercise. The other reason which I think Tim mentioned is to try and fight off losing muscle mass as you slim down. Apart from adding a few hundred calories to the diet, the 30-40 grams of protein help recovery and fight off the ravages of time. I think it's something like you lose 50% of your muscle mass between 25 and 50. A major reason for the metabolism slowing down (correct me if I'm wrong).