Lutein

A dietary carotenoid that concentrates within the human lens and retina and protects against age-related macular degeneration.  Unlike several other carotenoids, such as alpha and beta-carotene, lutein does not have pro-vitamin A activity.  Spinach and other dark green leafy vegetables are good sources of lutein.

See the Linus Pauling Institute Micronutrient Information Center for more information.