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Is There a Vitamin D Deficiency?
In March, an article in the Archives of Internal Medicine looked at data collected between 1988-1994 and 2001-2004 from the National Health and Nutrition Examination Survey (NHANES). The researchers compared levels of 25-hydroxyvitamin D, the product created once the liver converts vitamin D, and determined that 77% of the American population had insufficient levels.
Read on for more on health, including a look at the worst cities for allergies and essential information about swine flu.