I know ephedra has its problems. I did a bunch of research into it too. For some people it really does help though. And like I said my girlfriend has used it for years. I'm taking a very low dose, and one of the things about it is that it must be used as directed, if it's abused it will definitely cause you problems. I'm not promoting it at all, I know it has its negatives! (By the way, you can get AM-300 ephedra-free.)