Watermelon
The summertime fave is loaded with lycopene. "This antioxidant compound gives watermelon and tomatoes their red color—and helps skin stave off UV damage," says nutrition pro Keri Glassman, RD, founder of NutritiousLife.com. Researchers believe that the melon contains as much as 40 percent more of the phytochemical than raw tomatoes; that's the equivalent of an SPF 3, so use it to bolster (not replace) your daily dose of sunscreen.