It is possible to improve the appearance of scars, especially with this clinically proven formula. Scarguard MD is the first choice of plastic surgeons and dermatologists to prevent new scars from forming and flatten and shrink the appearance of old, raised scars, even keloids. Silicone shrinks scar tissue. Cortisone reduces irritation that can cause scarring. Vitamin E helps the skin to heal by softening and moisturizing the scar. The liquid formula dries quickly and provides a nearly invisible protective coating.