Vitamin E, Lutein May Fight Cataracts

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Several randomized clinical studies on vitamin E and cataracts -- including one of his own -- have had disappointing results, added McNeil, who heads the department of epidemiology and preventative medicine at Monash University in Melbourne.

Dr. Richard Bensinger, a spokesman for the American Academy of Ophthalmology, said he regards Christen's findings as "soft data," since it "wasn't designed to control for all the variables in diet and women."

For example, he said the study could not monitor the women's previous intake of food. That means that the researchers had to make assumptions about the amount of carotinoids in specific foods, although they can vary greatly based on how and where they were cultivated, he said.

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There's more on cataracts at the U.S. National Eye Institute.

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