Many individuals think of lutein as ``the eye vitamin.’’ They use the medicine to prevent eye infections including age-related macular degeneration (AMD), retinitis pigmentosa, and cataracts. Some people also use it for preventing breast cancer, type 2 diabetes, heart disease, and colon cancer. Many multivitamins contain lutein. They normally provide a relatively small amount of 0.25 mg per tablet.Lutein is also referred to as carotenoid vitamin. It is related to Vitamin A and beta-carotene. Some of the foods rich in lutein include kale, orange pepper, broccoli, orange juice, squash, spinach, corn, and kiwi fruit. Lutein is best absorbed when it’s taken with a high-fat meal.In summary, Lutein is thought to function as a light filter, protecting the eye tissues from sunlight damage. In fact, it is one of two major carotenoids found as a color pigment in the human eye (macula and retina). Some of the best ingredients found in lutein include: glycerin, bee wax, natural tocopherols, soy lecithin, sunflower oil, purified water, and gelatin. It is used as a dietary supplement with a recommended dosage of one softgel per day with food and water. It is a marigold flower extract.