Ok, i keep reading in the threads that takeing steroids for adolenscence is bad, but why is it? People say that if u take something like testosterone, how is that bad for a teen? ppl will argue that,"teens get more test naturally, and adding test will stop nat test production" can anyone show me some information on how that exactly works? y would injecting test make it stop producing naturall? i figure it juss adds to whats already being produced, its not like u are injecting into the part of the body where test is produced

if anyone can show me some sources its would be greatly appreciated. Now, im not asking this question in a way to glorify steroid use for teens, but just to clear things up, this topic comes up often.
ps. is Sustaject a legit product? it seems to be the only sust in a 10ml vial vs amps. are there other marks, and is there a difference between the amps and the vial?