I'm pretty sure long term usage does have side effects, some of them not beneficial, but for the love of pete- we let people drink alcohol and smoke cigarettes and eat junk food. All of those are bad for you, too. I agree with doing the studies and presenting an accurate picture of the risks, despite the anecdotal evidence from every user who feels the need to paint a picture of themselves as olympic athletes to defend themselves, but it's been fairly clearly documented that it's no where near as dangerous as alcohol.