OP your sig looks like Liz Vicious....From my days of long ago, liz vicious is a name I think I will remember forever haha
But to be helpful. The "standard" rule of thumb is always said to be 21. But the longer I study, and workout, the longer I put off using anabolics. Not that I dont want to, I get a stiffy thinking about it ^.^ (test, get it hahah...ok nvm) but you realize its not that big of a deal.
I mean yeah it can be done safely, and with many advantages. But for most I think it is a forbidden fruit that makes it so desired.