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"'Antioxidant' is a classification of several organic substances,
including vitamins C and E, vitamin A (which is converted from
beta-carotene), selenium (a mineral), and a group known as the
carotenoids. Carotenoids, of which beta- carotene is the most popular,
are a pigment that adds color to many fruits and vegetables -- without
them, carrots wouldn't be orange, for example."
From http://www.goaskalice.columbia.edu/0830.html
"Despite over four decades of research, our understanding of oxidative
damage and the role of antioxidants in health is still in its infancy.
Much of the research done to date has produced contradictory results."
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"Other studies have shown that diets high in the antioxidants called
carotenoids, especially lutein and zeaxanthin, did have a protective
benefit in reducing the risk of macular degeneration. These are found
primarily in green leafy vegetables, and the intake of spinach or
collard greens had the greatest benefit. Neither vitamins A, C, nor E
was especially helpful. (58) Scientists believe lutein and zeaxanthin
may help cells avoid oxidative damage from light exposure by absorbing
blue light (59). To prevent the onset of macular degeneration, some
doctors suggest wearing sunglasses to protect your eyes from
ultraviolet light damage and eating green leafy vegetables to keep
lutein levels high in the macula."
From http://www.infoaging.org/b-oxdam-17-r-macular.html
Quoted from Answers.Google.com
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