Stretch Mark Creams……?

Im 17 and have a lot of stretch marks on my butt and a few around my knees. b/c of this i am very self concious. . . i have done alot of research and though i realize that many ppl believe there is no cure for stretch marks, i am still ready to do practically anything to get rid of them. . .
i have never been over weight so that is not the cause and neither have i been pregnant. . . my doctor says it may be genetic
i found a bunch of creams on the internet an i was wondering if sum1 could help me pick out the best one to try. . . or if anyolne has tried on of them to please give me sum kind of review of the cream. . . thx alot cuz this is really important to me
1. StriPeptin-SM
2. ZENMED Stretta
3. Elastin 3
4. Revitol Stretch Marks Cream
5. Body Shape
6. TriLASTIN-SR
Thanks again for any help ^_^