Sunscreen is the final step in any good skin care program. Unfortunately, it’s also the most forgotten. It's easy to tell if skin needs washing or moisture; with UV radiation, most damage occurs below skin surface so slowly that we don't realize the extent until it’s too late. This damage accumulates daily in tidbits, like when you walk to your car or sit near a sunny window. Over time, this exposure causes wrinkles, dark spots and skin cancer.