This might prove to be helpful.....
If you already have them, there is a chance that you can reverse the process, here is the answer....
The fact of the matter is that stretch marks can appear on teenagers, overweight persons, pregnant women and especially bodybuilders. These marks can be prevented and in some cases removed by the application of vitamin E (up to 600 IU daily), the B complex, pantothenic acid (up to 300 mg/day) and an adequate intake of zinc and vitamin C.
Give it a try and see what happens.... the worst that can happen is that you still have them..... good luck and good growing.
Maxmuscle66