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Previous Volume 354:750-752 February 16, 2006 Number 7 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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There are many therapies that reduce the risk of fracture in people with osteoporosis. Calcium and vitamin D are the most widely used therapies for osteoporosis, even though their efficacy in terms of the prevention of fracture is uncertain. In fact, calcium supplements are the biggest seller in the multibillion-dollar dietary-supplement industry; annual sales in the United States in 2004 have been estimated to be as high as $993 million.¹

The effect of calcium supplementation on bone mineral density has been the subject of many studies. In general, calcium has a small beneficial effect on bone mineral density, but it . . . [Full Text of this Article]

Source Information

From the Endocrine Unit, Department of Medicine, Massachusetts General Hospital, Boston.

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