Almost every serious bodybuilder have at some point taking some kind of drug to get bigger. Its a well known fact about the doping drug "testosterone", that it makes your own production of the hormone shut down, in one way or another, if you keep injecting it for a long period. So, like you all may have read melanotan II increase your testosterones production, like the doping drug. So I wonder if there is any kind of research about this, if it could be dangerous to use for a long time.  
My first thought is, could you own production get shut down of melanotan II like it gets from testosterone (regular use)? Could melanotan II be used for the same purpose (to increase the production, and get better results from training)?
 
Maybe this would not be a problem for someone who is a bit older (25+), but for us who net yet reach even 20, yeah, what about those?
 
 

I'm not quite sure what you're asking, but melanotan has no effect on testosterone levels.