I just saw your age In your bio, don't mess with any of it!!! Your natural testosterone levels should be through the roof which means you should be able to make awesome gains with diet and lifting. If you start on anything that is going to mess with your Hpta before it is fully developed ( which is around 25 ) , you will damage your bodies natural ability to produce testosterone. Which means you will have to go on testosterone replacement therapy for the rest of your life. Which will suck and be expensive and you won't be a man anymore.

When I was your age I was able to see amazing results in a very short amount of time with an intense lifting program. Put in some hard work and you won't feel the need for them. Good luck.