if youre 15 you would be an idiot to take steroids. I used prohormones when I was 17 and i deeply regret it. You will stunt your growth and ruin any potential you may have. Be a man and train naturally for at least 5 more years.
How many times are you going to ask the same question you dumb kid. At this point, I'm sure most of us would prefer you DO steroids, off yourself, and for god's sake, not reproduce.