Lutein is called a carotenoid vitamin. It is related to beta-carotene and vitamin A. Foods rich in lutein include broccoli, spinach, kale, corn, orange pepper, kiwi fruit, grapes, orange juice, zucchini, and squash. Lutein is absorbed best when it is taken with a high-fat meal.
Some people also use it for preventing colon cancer, breast cancer, type 2 diabetes, and heart disease.
Many multivitamins contain lutein. They usually provide a relatively small amount of 0.25 mg per tablet.