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Vitamin D Defiency--An Unrecognized Epidemic

It's an often overlooked problem that may affect millions of U.S. adolescents. Often undetected and untreated, vitamin D deficiency puts them at risk for stunted growth and debilitating osteoporosis later in life. Youngsters in northern cities with less intense year-round sunlight are especially prone to vitamin D deficiency, as are blacks and other dark-skinned ethnic groups whose pigmented skin doesn't absorb sunlight as easily as whites. Very few doctors actually do the blood test for...