Lutein and Zeaxanthin are natural pigments also known as "carotenoids". Carotenoids are fat-soluble antioxidants naturally found in fruits, vegetable and plants, including marigolds and sunflowers. These antioxidants help to protect the body from cellular and tissue damage caused by harmful molecules called free radicals, which cause biological rusting (oxidation) in the body, and may enhance the negative effects of aging.