Reduce Stretch Marks

I’ve been heavy all my life, and I’m going to go in for the gastic bypass surgery in a few months. I was wondering, is there anything I can do now to help with the stretch marks, so they’re not as prominent later? I’ve heard cocoa butter helps, but I’m not sure if that’s just for pregnancy. I’m 19, and I’ve been morbidly obese all my life, so the stretch marks are a bit more than pregnancy ones.

Thanks in advance!