Besides using a sunscreen that is right for your needs, Dr. Oz says there are three other things you need to do to make sure your skin is beautiful.

The first key is making sure you get plenty of vitamins A, C and E—through diet and nutrient-rich creams. "Those are the key antioxidant vitamins. But they're also important, especially vitamin A, because they block some of the bad things happening underneath," he says. "And they help rejuvenate—turn on cells that make more collagen, make more elastin—to give you that bounciness that you want."

Dr. Evans says vitamin A is especially important for healthy skin. "It can make real transitions in the beginning. In fact, some of the damage you've already done—it can turn back the clock," she says. "You see it in retinol forms. Pretty much anything like a retinyl or retinoic acid or retin is a form of vitamin A."

Another nutrient you need is niacin, which prevents melanin from reaching the skin and reduces the production of the staining compound. Dr. Oz says you can also use natural licorice extract to slow the creation of melanin.

The third key part of a healthy skin routine is exfoliation. "Sun spots are stuck in the skin, so if you stop making new ones, your body rubs off the old levels," Dr. Oz says. "That's basically what exfoliation is, but you do it naturally. We shed dozens of pounds of skin a year. ... And your body will shed those sun-damaged areas."