How can i get make stretch marks less noticeable?

Yes, but no: Stretch marks are tears in the skin cause by weight gain. They can be covered up, but not improved by creams and lotions. The only possibly effective therapy is cosmetic plastic surgery, but that's a big step for a non-health and non-life threatening problem. Tanning may cover them up, but may also make them look more prominent as they may tan differently than the other skin.