Ephedra

I don't think I've ever heard of ephedra before, looks like a dietary supplement and after a little research, it looks to be an effective substance for weight loss, but there also seems to be some controversy surrounding it.

There looks to be other species of this plant extract, that don't have the issues surrounding it, but I'm not entirely 100% on that. May be interesting to follow the developments on this supplement just to see what happens, can be that bad though, the Chinese have been using it for 5,000 years.