Lycopene is a powerful antioxidant that may help protect cells from damage.Lycopene is a naturally occurring chemical that gives fruits and vegetables a red color. It is one of a number of pigments called carotenoids. Lycopene is found in tomatoes, watermelons, red oranges, pink grapefruits, apricots, rosehips, and guavas. In North America, 85% of dietary lycopene comes from tomato products such as ketchup, tomato juice, sauce, or paste. A serving of fresh tomatoes contains between 4 mg and 10 mg of lycopene, while one cup (240 mL) of tomato juice provides about 20 mg. Processing raw tomatoes using heat (in the making of tomato juice, tomato paste or ketchup, for example) actually changes the lycopene in the raw product into a form that is easier for the body to use.