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Low vitamin D levels linked to high risk of premenopausal breast cancer
Date:1/24/2013

ent of Defense Serum Repository for routine disease surveillance. The researchers thawed and analyzed pre-diagnostic samples of serum from 1,200 women whose blood was drawn in the same time frame samples from 600 women who later developed breast cancer, and from 600 women who remained healthy.

A 2011 meta-analysis by Garland and colleagues estimated that a serum level of 50 ng/ml is associated with 50 percent lower risk of breast cancer. While there are some variations in absorption, those who consume 4000 IU per day of vitamin D from food or a supplement normally would reach a serum level of 50 ng/ml.

Garland added that a consensus of all available data has shown no known risk associated with this concentration of vitamin D, which is measured as serum 25-hydroxyvitamin D. But he urges patients to ask their health care provider to measure their serum 25(OH)D before substantially increasing vitamin D intake.

"Reliance should not be placed on different forms of vitamin D, such as vitamin D2, and megadoses should be avoided except those ordered by a doctor for short-term use," Garland added.


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Contact: Debra Kain
ddkain@ucsd.edu
619-543-6163
University of California - San Diego
Source:Eurekalert

Page: 1 2

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