The reason the benefits will be minimal is because at 17 your test levels are already through the roof, and odds are you wont be able to push them too much higher. You'd be better suited spending your money on food, and really pushing your maximum genetic potential. I'm 20 and just started using a natural test stack (Tropinol, DAA, and Reversitol), and do notice a difference, but that's only because I had bloodwork done and I was on the lower end of the normal spectrum, so my doctor said it couldn't hurt to try and jack up my test levels a bit. Unless you have lower than average test levels, no real need for it. Wait a few years then try something, stay consistent, eat, and train hard