Lutein for Eye Health
Lutein is concentrated in the macula, a small area of the retina
responsible for central vision. Lutein helps keep the eyes safe
from oxidative stress and the high-energy photons of blue light. Several
studies show that an increase in macula pigmentation decreases the
risk for eye diseases such as Age-related Macular Degeneration (AMD).
The only randomized clinical trial to demonstrate a benefit for lutein
in Macular Degeneration was a small study, in which the authors
concluded that visual function is improved with lutein alone or lutein
together with other nutrients and also that more study was needed.
Lutein may also play a role in Haidinger's brush, an entoptic phenomenon
that allows humans to detect polarized light.
While no recommended daily allowance currently exists for
lutein as for other nutrients, positive effects have been seen at
dietary intake levels of 6–10 mg/day. The only definitive side effect of
excess lutein consumption is bronzing of the skin (carotenodermia).
Lutein is a naturally-occurring carotenoid. Lutein is found in green
leafy vegetables such as
spinach and kale. It's
also found in egg yolks, animal fats.
Some foods are considered good sources of the nutrients:
||Lutein/zeaxeathanin (micrograms per hundred grams)
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