Lycopene, a flavonoid antioxidant, is a unique phytochemical compound found in the tomatoes. Red variety fruits tend to possess more of this antioxidant. Together with carotenoids, lycopene may help protect cells and other structures in the human body from harmful oxygen-free radicals. Studies shows that lycopene protects the skin from ultra-violet (UV) rays and thus offers some defence against skin cancer. Zea-xanthin is another flavonoid compound present abundantly in this vegetable. Zea-xanthin helps protect eyes from "age-related macular related macular disease" (ARMD) in the elderly persons by filtering harmful ultra-violet rays.