Lutein, a chemical found in green vegetables, is a member of a family of substances known as carotenoids. Beta-carotene is the most famous nutrient in this class. Like beta-carotene, lutein is an antioxidant that protects our cells against damage caused by dangerous, naturally occurring chemicals known as free radicals. Recent evidence has found that lutein may play an important role in protecting our eyes and eyesight. It may work in two ways: by acting directly as a kind of natural sunblock, and also by neutralizing free radicals that can damage the eye.

Lutein is not an essential nutrient. However, it may be very important for optimal health. We're learning more all the time about nutrients like lutein that aren't required for life, but protect us in various ways. At present, an intake of about 6 mg daily of lutein is considered adequate. Green vegetables are the best source of lutein, especially spinach, kale, collard greens, romaine lettuce, leeks, and peas. Unlike beta-carotene, lutein is not found in high concentrations in yellow and orange vegetables such as carrots.

Evidence suggests that people who eat foods containing lutein are less likely to develop cataracts and perhaps macular degeneration as well, the two most common causes of vision loss in adults. However, these were observational studies, in which researchers follow patients to see what illnesses they develop with different types of diet. Because lutein is found in vegetables that may also contain other helpful substances, we don't know for sure if it is the lutein itself that is providing the benefit. We really need studies in which some people are given pure lutein and others placebo, but as yet they have not been performed.

However, there are reasons to believe that lutein may indeed play an important role in protecting the eyes. Lutein is the main pigment in the center of the retina, the region of maximum visual sensitivity known as the macula.

One of the main causes of macular degeneration appears to be sun damage to the sensitive tissue. Lutein appears to act as a natural eyeshade, protecting the retina against too much light.

Besides protecting the macula, lutein may also shield the lens of the eye from light damage, slowing down the development of cataracts.

Furthermore, lutein fights free radicals. These chemicals can also damage the retina and the lens.

Note: Lutein may help prevent macular degeneration, but it has not been proven to treat the condition once it has developed. If you already have macular degeneration, medical supervision is essential. Lutein might also help prevent atherosclerosis.

E-mail a friend about this item.

Send Page To a Friend