Don't listen to broscientists who say "The rats that got cancer were taking a huge amount" Because in reality rats/mice can process toxins a lot faster than a human can, so those doses were scaled to make them the equivalent of a human. If you want to risk a drug that gave 100% of rats involved in the tests cancer then more power to you. But I wouldn't risk it. For your actual question I have a friend who used it, he's a bit overweight and it gave him god like cardio. Unfortunately the cardio vanished when he went off it.