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Lutein is a yellow-orange carotenoid present in many plants. Lutein and a related carotene zeaxanthin are found concentrated in the eyes (particularly in the macula and lens), where they help absorb damaging blue light. As an antioxidant, lutein can help protect the eye from free radical and sun damage. Lutein supplements may benefit those who spend hours outdoors, drive long distances, or spend long hours in front of computer monitors.