Hey man, if you are 17 i wouldn't even think about it yet. You haven't fully matured enough to start messing with AS. Work hard, eat clean, get enough sleep and stay intense. Try some supplements from GNC, up the vitamin in take and just work hard. The results might not be what you want, but trust me, it's the best way to go. It's only a suggestion. If you do decide to take AS, be careful and stay safe. Nick