That is a grossly and falsely precise statement, "99.9%", and you CANNOT cite a professional peer reviewed study concluding "99.9%."
In general, androgenic-anabolic-steroid use correlates with elevated mania and hypomania. The causes are secondary effects of steroid metabolism, e.g., increasing testes mass, testosterone concentration, et cetera.
You are right, I cannot prove the 99.9% by peer review study, but you were the one to make the insinuation that roid rage is a factor, so why dont we start with you citing biological claims first, yes? *Edit - this clearly was not stated by you^^^my mistake
but that aside, yes. ethics boards are not too keen on giving humans super physiological amounts of anabolic steroids. That being said, we have a large body of both anecdotal data and extrapolatory data that shows this is GENERALLY not the case.
Add on top of that, for generality sake, there are AT LEAST 100 or so different substances that are typically used in thousands of combinations that are used often for athletic and physique performance, (commonly called "steroids")and only very few of those(I'll leave out the names in case this is against forum rules) have even been rumored to have mood changing effects.
Let's look from another angle. Some of the most popular ones are testosterone based. Are you telling me that men, since they naturally have testosterone, are more "rage prone" than women? Or men with higher testosterone levels will be more violent than those with lower testosterone levels?
Are we sure it's not the differences between men's and women's levels of dopamine and Seratonin? Maybe estrogen or progesterone level? I'm sure you know conversion rates of most of that testosterone, as it ends up being converted to estrogen anyway...
now anecdotally, anabolic use is WIDESPREAD in the US, and it's not even legal here. It's completely saturated professional sports, and let's not even start with the military.
There should be steroid induced felonies ALL OVER. I mean every twenty minutes. Yet, whenever we hear about steroid induced rage in the media, it's always mixed with copius drug abuse and personality disorders (chris benoit, anyone?)
Haven't heard of Lance Armstrong or mark Mcguire killing people in a roid induced rage, right?
So to answer your question, no, most scientists would never get an ethics review board to approve super physiological dosing of steroids in humans. But having trained hundreds of bodybuilders on them, and the other large amount on anecdotal evidence, combined with some basic biochemistry....I think it's safe to say taking steroids is NOT going to cause an officer to shoot someone they normally wouldnt.