well for starters, your friends will be the jealous ones when your the only one of the group thats still able to achieve a boner. whats going to make you bigger/stronger is food(tons of it), dedication, protein, knowing what your doing in the gym, time, patience, sleep, and some more food. learn how to train better and learn about how to fix up your diet for bulking. no girl is going to care how strong/built your friend is if his **** doesn't work. dont be dumb like your friends, stay away form all prohormones and all steroids until at least your 21 like Z said before. 16 is sooooo young to take a steroid, the years between 16 and 21 are the MOST important years of your life in terms of the development of your endocrine system. its by far the worst time possible to even consider taking a steroid. with all the dishonest companies out there at the moment you need to research every thing you consider taking to make sure its not a prohormone or steroid and you wont end up like the other kids that get on here and start a thread saying things like "hi, im 18 and i took this supplement then after i found out its actually a steroid and i think i really messed my self up....". dont believe me, look around on the boards and you will see the kids who took steroids and are now sorry. point is stay away for them for at least five years. good luck bro.