This is why I said that from what you said here:
I really ant to shred my body up. I wanna be at about 8% bodyfat with nice abs.
That to me sounds like you want the fitness model look, which there is nothing wrong with it but what you want can be accomplished easily with a cut cycle! your right I know nothing about you nor do I care to I was making that assumption from what you said so chill out!
I am in my early 20's and have been using GH for a long time and the results are great but for what you described you don't need it!
A million people will tell you you don't need it, but one says it can be good and you jump all over it! You sound like some of the 14-15 year olds that come on my board and want to juice and no mattre what we say they will do it anyways! No disrespect, but if anyone was about to be on your side it was gonna be me since I started gh around your age and stay on it almost year round!
Yuo stated your goals being you want abs and to go to 8% without losing much muscle... a fina/prop/eq cut cycle or any of the kind could give you those results with dedication!
To start noticing the great fat loss effects of GH it takes months, sometimes people don't notice much for the first few months so for your goals I don't think it is necessary!
If you think so then go ahead and do it, it will work on you even though you are young there is nothing wrong with it, but like I said you can get where you want with what I said!