Mederma skin care Visibly reduces scars resulting from surgery, injury, burns, acne and stretch marks in 8 weeks (Results depend on the length, skin type, age and location of the scar) An easy to use, greaseless gel that helps scars appear softer and smoother. Formulated with Cepalin and Allantoin (a proprietary botanical extract that restores your skin's wellness). Mederma is the No.1 Doctor recommended product in USA for scars.