do you use cocoa butter to try to prevent stretch marks (or lessen them if you do get them) or something else?

T🌸 β€’ Baby girl born 09-20-2017 πŸ‘ΆπŸ»πŸŒˆ
I'm 6 weeks and I've already started slathering myself with cocoa butter lotion, I have some stretch marks from gaining weight as a teen so I'd like to prevent them from getting much worse... my older sister slathered herself in it several times a day throughout all three of her pregnancies and she doesn't have a single stretch mark while the rest of my family has them so idk if it helped prevent them or not. What do you use?Β