The cheery red color comes from lycopene, an antioxidant. Studies show it may help curb your risk of cancer and diabetes as part of a healthy lifestyle. Watermelon has more of this nutrient than any other fruit or veggie -- even tomatoes. To load up on lycopene, choose a melon with bright red flesh rather than yellow or orange. And the riper, the better. Also, seedless melon tends to have more lycopene than those with seeds.