hey DisCreeT, lay off the idea of juicing if you are a teenager.
you will be in a very anabolic state as you are anyway - if you juice now you may get big, but you will stunt your growth for sure.
Aint no good having muscles like arnie and the height of de vito.
Hit the protein creatine, ZMA, eat big, train heavy and rest up - there is no need to juice at this stage.