Hello, gw here. I am sending you this pm in regard to your thread about juicing too early. At 19 years old, most people are right about the discipline aspect, diet aspect etc etc.......The real reason for needing to wait is because at 19 your body is not done growing. While you may feel you are not growing height wise, you body still develops width wise. Your bones may still widen till you're 25. So you may stunt yourself height wise and width wise by closing your growth plates too early.
Second reason is that most steroids are psychoactive substances which may at such an early age affect you brain development and give you behavioral problems and possibly lead to steroid addiction, depression, rage etc....Happen all the time to young people trust me on that one. It may cause steroids to become your life long habit.
Third, your endoctrine system is not yet stabilised. By juicing now you WILL shit down a system tht is trying to stabilise and manage all your growth porcesses at this age. The effect here could be chronically low testosterone levels for life. That again would bring you to my previous point of possibly ending up with steroids as your lifetime habit.
Point is, these substances are not bad per say, it's just that you have to taken them when you are ready, not before. Better later then sooner. Remember that bodubuilding is a life long sport, so take you time and don't cheat yourself to get more sooner.