I had a friend use it. He looked like he was dying, smelled like shit, and struggled to even move around while on it, but he dropped bodyfat so quickly that I wouldn't believe it if I didn't see it. You could SEE the loss of bodyfat each day! For me personally, poisoning myself and temporarily destroying the Krebs cycle and interfering with the entire bodies cellular energy production system to drop some bodyfat quickly just doesn't appeal to me. It also doesn't help that you are as frail as a 100 year old person while taking it. If you get stuck in the heat, you can quickly over heat and die, if you aren't constantly drinking water you can overheat, cause kidney damage, dehydrate all of which lead to death. Pass for me.