at his age i wouldnt recommend messing with his hormones yet. he should be able to acheive great results naturally. i know he prob doesnt want to hear this bc sounds like hes trying to take a short cut, but all he needs right now is to get his diet in check and follow a solid routine. fasted morning cardio will work wonders, he should try that for alittle while, acheive a solid base, then try some aas in a few years when the results dont come so easily naturally