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Lutein
Lutein is an antioxidant in the carotenoid family (a group of naturally occurring fat-soluble pigments found in plants). Lutein is the primary carotenoid present in the central area of the retina called the macula.
Where is it found?
Spinach, kale, collard greens, romaine lettuce, leeks, peas, and egg yolks are good sources of lutein.1
Lutein has been used in connection with the following conditions (refer to the individual health concern for complete information):
| Science Ratings | Health Concerns |
|---|---|
 |
Cataracts Macular degeneration Retinitis pigmentosa |
 Reliable
and relatively consistent scientific data showing a substantial health benefit. Contradictory, insufficient, or preliminary studies
suggesting a health benefit or minimal health benefit. For an herb, supported by traditional use but minimal
or no scientific evidence. For a supplement, little scientific support and/or minimal health
benefit. |
|
Who is likely to be deficient?
While a deficiency has not been identified, people who eat more lutein-containing foods appear to be at lower risk of macular degeneration. One study found that adults with the highest dietary intake of lutein had a 57% decreased risk of macular degeneration compared with those people with the lowest intake, and of the carotenoids, lutein and zeaxanthin are most strongly associated with this protection.2 In a preliminary study, a similar link was suggested between low dietary lutein and increased risk of cataracts.3
How much is usually taken?
People showing protection from macular degeneration have been reported to have eaten about 6 mg of lutein per day from food. Lutein, in supplemental form, should be taken with fat-containing food to improve absorption.4
Are there any side effects or interactions?
No adverse effects from lutein have been reported.
Lutein functions together with zeaxanthin, another antioxidant found in the same foods and supplements as lutein.
At the time of writing, there were no well-known drug interactions with lutein.
References
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The information presented in Healthnotes is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires September 2008.