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    Women on HRT Helped by Extra Calcium, Vitamin D?

    Study found hip fracture rate was 57 percent lower in those also taking supplements

    WebMD News from HealthDay

    By Serena Gordon

    HealthDay Reporter

    WEDNESDAY, June 26 (HealthDay News) -- Although there has been significant debate about whether calcium and vitamin D supplements are beneficial for older women, new research suggests that the answer may be yes for those who are taking hormone replacement therapy.

    Women using HRT who also took daily supplements of calcium and vitamin D saw a 40 percent reduction in their rate of hip fractures compared to women who took placebo supplements, according to the study.

    "We found that women who were on hormones had less hip fractures, and women who were on hormones and calcium and vitamin D supplements had even fewer hip fractures," said study author Dr. John Robbins, a professor of medicine at the University of California at Davis.

    Results of the study were published online June 26 in the journal Menopause.

    As many as half of all women over 50 will have an osteoporosis-related fracture in their lifetime, according to the U.S. Preventive Services Task Force (USPSTF). Osteoporosis is a condition caused by a loss of bone mass and density, which leaves bones fragile and more susceptible to fractures. Calcium is an important component in bone growth, and vitamin D helps the body absorb calcium.

    What's not clear is if supplements of these nutrients are as helpful in keeping bones strong as they are from natural sources, such as diet. The USPSTF recently looked at the effect of 1,000 milligrams of daily calcium and 400 international units of vitamin D. In February, they concluded that women shouldn't take calcium and vitamin D supplements because the available evidence wasn't strong enough to show a significant benefit. They added that the benefits of higher doses are unknown.

    The new study included data from the Women's Health Study on about 30,000 postmenopausal women between the ages of 50 and 79. Many of the women were taking hormone replacement therapy -- either estrogen alone or a combination of estrogen and progesterone.

    Just over 16,000 women participated in the calcium and vitamin D portion of the study. They were randomly selected to receive either a placebo or 1,000 milligrams of calcium and 400 international units of vitamin D each day. The average follow-up time was about seven years.

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