Sharpeye the real reason these products say 21 and older is because they are manipulating your bodys hormones. There is no scientific age at which every single person is done growing or their body has leveled out its balance of hormones to what is perfect for them. Every single person is different. You have no idea what your own hormone levels are at, and if you went and got them tested at a doctors office all they can do is read you the results and give their best educated guess on what your body is doing judging by where your levels currently reside. If you take these products there are many risks. America is banning these products because young adults like yourself cannot rationalize and make responsible decisions, partially because your hormones are at or around your 19yr mark where they are in their prime. If you take these you face many setbacks once your off them, and the risk is great. Your testes might just like the vacation your giving them and never bounce back from what you are about to do. You are lost in the moment and all you want is to get huge especially right before you get on the college market, ive been there and understand. People will look at you especially girls and be like DAYUMMMM, girls will just be like YUMMMM. But then a few years from now when your body cant rebound from what your gonna do your just gonna be puny, misproportioned, and possibly have a ton of estrogen in your emotionally unstable older body. Those same people that saw you in college or in highschool are gonna be saying what you will say about so many others, wow she let herself go, or woah that dude got fat as hell, he used to be a jock. DONT GET LOST IN THE MOMENT!!!! Or it will be your last, you wont even be able to look at yourself in a few years without being disgusted and filled with regret. I was born in 1986 and am just now trying these products for the first time, ive been paitent, it pays off.