Michael71, "lifting for a while" is four, five, six + years. I've been lifting for a while too (18 years) and you need to seriously listen to the people on this board. Supplements are for when your body is no longer producing what it normally can. At 15 your body is just about to kick start on it's own! Don't screw things up now. Like more 15-20 year olds, you're gonna do whatever you d@mn well want to do. Take in everything you can here and go forward. Just like the header on AM says, "learn teach lead"