New research suggests some foods have the power to guard skin from the damage caused by the sun's UV radiation. While a salad is no substitute for sunblock, these healthy foods could add inner protection against sunburn and wrinkles at the cellular level.

Citrus Fruits

Citrus fruits have the potent ingredient limonene, associated with a whopping 34 percent lower risk of skin cancer in one University of Arizona study of 470 women and men.