Best fat burner I've ever used. Works extremely well on a decent diet. Noticible results using this product with regular crossfit and spin classes. Keeps me going for the morning instead of a coffee, and tastes delicious. Have also tried having a few weeks without it to see if there is a noticible difference and there really is. Fat burning was down in the time off, and increased again once I started using it. Would highly recommend to anyone looking for a new fat burner to try. Best on the market. Pink grapefruit is the ducks nuts!