The main ingredient is DHEA which raises test and estreogen but there is estrogen blocker is methyl 1-d a ph or a test booster and is it safe for someone 18 to use who wants to stay away from ph till 23 when done growing. If it is DHEA i dont see why a teen cant take it because the estrogen build up will be blocked and most will be testosterone. If the whole DHEA thing is wrong please tell me i mean i already make good gains some kids i know bin going 6 years even ones into it and i have bin for 2 and already got stronger and bigger then them who also bin on ph and i just take protien and i lean bulk right by eating over maintance calories i now how much grams of protien i take in a day and have everything down so 18 or 21 any advice would be appreciated