Lutein is a yellow-colored pigment that belongs to the carotenoid family. In humans, it is found in the eyes, in the central area of the retina called the macula, where a person’s visual perception is most acute.
Lutein reduces age-related macular degeneration and helps filter out damaging light. One study conducted in 1994 found that adults with the highest dietary intake of lutein had a 57% decreased risk of macular degeneration compared to people with the lowest intake. A similar trial conducted in 1992 found a link between intake of lutein and an increased risk of cataracts.
Lutein also functions as an antioxidant. Anecdotal evidence suggests it helps protect skin cells against ultraviolet radiation and may fight several forms of cancer, including those that affect the colon, rectum, breast, lungs and prostate.
People whose eyes appear to be better protected from macular degeneration have taken a minimum of 6mg per day. Many practitioners recommend that lutein supplements be taken with food to improve absorption.
Black currant fruit; collard greens; egg yolks; kale; leeks; peas; romaine lettuce; and spinach are all excellent sources of lutein. In addition to food sources, lutein is also available as a dietary supplement in capsule or tablet form.
Deficiency and toxicity levels have yet to be established for lutein; however, studies show that people who eat more lutein-containing foods are at a decreased risk of macular degeneration. No adverse effects from lutein have been reported; there is currently no evidence of drug interactions with lutein.
References
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