date:Sep 18, 2012
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But its main nutrient, says Frechman, is calcium, and most Americans are not getting the recommended amounts of calcium. Calcium is needed to build bone and teeth, help muscles to contract, and improve nerve function, she says. It plays a role in blood clotting and the dilation and contraction of blood vessels, which affects blood pressure.
Robert Post, deputy director of the USDA's Center for Nutrition Policy and Promotion, says of the four nutrients that are of public health concern becau