Not harmful if taken sensibly and under a 'qualified physician's' care.
Back in them olden days when roids were legal and relatively unknown, the local docs who trained with the gym regulars would come to us and ask US about the use of roids and the eventual results of that usage. Those were the days when most users kept that usage to a minimum and the docs had to refer to the PDR to talk about the subject sensibly with the gym-rats.
And the docs admitted back then that anabolics were not even discussed during their medical ed-u-ma-ca-tion because the AMA declared that they 'did not work' to enhance physical performance or increase muscle mass. In fact the AMA was adamant in declaring their ineffectiveness.
In fact one doctor fought us constantly about roid usage claiming that any results were due to the placebo affect.
But then about five years later he wrote a book about vitamins and roids and in the preface of that book he made a 'public apology' to me and one other athlete (whom your all know) for doubting us about the benefits of anabolics.
Over the years athletes and bodybuilders came to the conclusion that "Less was shit and that more was better!" and adverse roid usage became a common practice.
This 'adverse usage' proved to be extremely successful and beneficial among athletes and their athletic endeavors, so those who were not privy to anabolic information found themselves bring 'picked last' in various sporting activities and often failed to make the team.
One such failure occurred at Annapolis during the pre-football season when one 'natural contenda' failed to make the team.
When asked by his dad (who just so happened to be some political politician such as a US Senator or US Congressman), "Why didn't you make the team, my son?", the son responded somewhat as follows ....
"Because I wasn't taking steroids like all those other guys!"
ANd that was just enough of a complaint to get the anti-steroid campaign on its way and become an eventual felony under the eyes of the law even though the AMA objected, while everyone else just sat back and watched it happen.
And the IOC was a major part of this anti steroid campaign. (But that's a much larger story)
So over the years guys who didn't belong in jail got jail time and the continual sale of anabolics went underground and made lots of "criminals' very wealthy.
But even today anabolics sometimes disappear from evidence lockers and yada, yada, yada.
Much more to say, but GetBiggers tend to fall asleep when too many words are posted, so I'll end this here and add more later if anyone is really interested.
Your good friend, Stunt