December 18th, 2009

Did you know that high doses of Vitamin C may increase women’s risk for cataracts?

Reports Reuters:

Women who take high-dose vitamin C supplements may be increasing their risk of age-related cataracts, hint findings of a Swedish study.

Among nearly 24,600 adult women followed for more than 8 years, those who reported regular or occasional vitamin C supplementation of about 1000 milligrams per serving were about 25 percent more likely than those who did not take supplements to have age-related cataracts removed.

Women who took extra vitamin C for 10 years or longer; or in combination with being 65 years and older, or taking hormone replacement or corticosteroid medications had even greater risk, researchers found.

However, in the American Journal of Clinical Nutrition, Alicja Wolk, of the Karolinska Institutet in Stockholm, and colleagues caution that the apparent association between vitamin C and cataract risk does not involve vitamin C obtained from fruits and vegetables.

Rather, their study assessed cataract risk related to the high-dose vitamin C supplements common in Sweden. Their findings, the researchers note, support results from some previous studies.

Find out more at Reuters.