Corn is an excellent source of lutein, a type of carotenoid. Like lycopene, lutein shields your skin from UV damage. If corn is out of season, don’t hesitate to turn to frozen alternatives. Frozen vegetables may be even more healthful than some of the fresh produce sold in supermarkets, says Gene Lester, Ph.D., a plant physiologist with the USDA Agricultural Research Service. Why? Fruits and vegetables chosen for freezing tend to be processed at their peak ripeness, a time when—as a general rule—they are most nutrient-packed.