I have never studied and tried to find concrete numbers on what "X" compound will do to any given person's endocrine system. But, at your age and assuming your natural testosterone levels are correct and that you do not have any health issues, you should be creating more than enough natural testosterone to grow. Eat well, train right, and use non hormonal supplements like creatine, protein, etc and you'll grow.
Now for the bad news. Males, on average at age 26 start into a 2% per year decline of testosterone production for the rest of their lives. If you tinker with your endocrine system at a young age, you can accelerate both the onset and rate of this decline. Do you like having sex? Ever wanna have children? Do you want to have to engage in HRT at age 30? Switching your endocrine system off and on at your age is NOT a good idea.
Be patient. Learn how to REALLY train. Learn how and when to eat. Then, if you use PHs or whatever down the line, you'll get a MUCH better result from them.