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Vitamins C, E Won't Cut Risk of Pregnancy-Linked Hypertension
Date:4/7/2010

Large study casts doubt on theory that antioxidant nutrients might help prevent preeclampsia

WEDNESDAY, April 7 (HealthDay News) -- Mothers-to-be who take vitamin C and E supplements do not reduce their risk of the dangerous high blood pressure condition called preeclampsia, a new study finds.

Although other studies have suggested that these antioxidant vitamins could prevent preeclampsia, this trial of more than 10,000 women found there was no sign "that the drugs did anything to prevent the diagnosis of preeclampsia," lead researcher Dr. James M. Roberts, from the departments of obstetrics and gynecology at the University of Pittsburgh, said during an afternoon news conference Tuesday.

"That was the disappointing news," he added. "On the other hand, there was no evidence of problems associated with it [the vitamins] that might have been suspected from earlier trials, except for the interesting finding" that women who took the vitamins experienced spikes in blood pressure slightly more often than women who did not.

The report is published in the April 8 issue of the New England Journal of Medicine.

Preeclampsia is a sudden increase in blood pressure occurring usually after the 20th week of pregnancy. It can affect the mother's kidney, liver and brain and if untreated can be fatal to the mother and the baby or lead to long-term health problems, according to the U.S. National Institutes of Health.

Earlier studies had suggested that antioxidant vitamins C and E might lower the risk of preeclampsia by preventing damage from free radicals, which are byproducts of the body's use of oxygen. The theory was that free radicals prevent the placenta from developing normally and interfere with blood flow from mother to baby.

To test whether there were benefits to taking antioxidants during pregnancy, Roberts's team randomly assigned more than 10,000 women to daily supplements of vi
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