Salmon

The omega3 fatty acids in oily fishsuch as salmon and tunacan boost your skins defenses against UV damage. In a study published earlier this year in theAmerican Journal of Clinical Nutrition, researchers found that those who ate a little more than 5 ounces of omega3rich fish each week decreased the development of precancerous skin lesions by almost 30 percent. Scientists think the omega3s act as a shield, protecting cell walls from freeradical damage.