This is by far the best fat burner I have ever taken, I've tried a lot of them in the past but none of them come close to synedrex. I just purchased my second bottle, this stuff is great. I've lost about 7 pounds on it while maintaining a healthy diet and exercise regimen (6 days a week). I did find that it really hits you hard if you haven't had anything to eat recently. I was surprised when I got the burst of energy but still felt composed and level headed. I recommend this product to all my friends because it works so well. It is on the pricey side but well worth every penny!