Vitamin B can prevent vision loss, study finds

CHICAGO — Taking B vitamins can prevent a common type of vision loss in older women, according to the first rigorous study of its kind.

Age-related macular degeneration is the leading cause of blindness in people 65 and older, with nearly 2 million Americans in the advanced stage of the condition. It causes a layer of the eye to deteriorate, blurring the center of the field of vision and making it difficult to recognize faces, read and drive. T.

Preventing it has been more elusive.

“Other than avoiding cigarette smoking, this is the first suggestion from a randomized trial of a possible way to reduce early stage AMD,” said William Christen of Harvard-affiliated Brigham and Women’s Hospital in Boston, who led the research.

The more-than 5,000 women in the study who took a combination of B vitamins — B-6, folic acid and B-12 — reduced their risk of macular degeneration by more than one-third after seven years compared to women taking dummy pills.

It’s too soon to recommend B vitamins to people who want to prevent age-related vision loss, he said. But people who already have the disease should talk to their doctors about over-the-counter eye-protecting supplements, including vitamins C and E and zinc, which prior studies have shown slow the disease.

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