Yeh, vitamin E oil is good too. My sister is a dermatologist, and I asked her awhile back about stretch marks. She usually sees them on woman after they have had a baby, or fat people who lose a lot of weight. She says there is not any "magic potion" for them. Stuff like the cocoa butter and vitamin E oil helps some. I have them on my arms, shoulders and a couple of places on my pecs. If they have some discoloration, there is apparently a prescription bleaching cream a doc could prescribe for you, that does help over time.
I think any MD could probably (and probably would) prescribe it for you, but I don't recall what the name of the stuff is.