This news comes from a University of South Carolina research team studying breast cancer, who found that women with aggressive and late stage breast cancer were more likely to be deficient in vitamin D than women with less dangerous types of breast cancer. The investigators looked at vitamin D levels in 107 women who had been diagnosed with breast cancer in the previous five years. Of this group, 60 women were African-American; the other 47 were white. Blood samples showed that the vitamin D levels among the African-American women were about one third lower than they were among the white women. One reason for the difference might be that darker skin can block production of vitamin D in response to sun exposure. Levels of "D" also tend to be lower among those who are overweight or aren't very physically active. The study results were presented at a conference of the American Association for Cancer Research and are considered preliminary until they're published in a peer-reviewed medical journal.
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