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Article: Calcium
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- Nutrition and Well-Being A to Z
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Copyright informationCOPYRIGHT 2004 The Gale Group, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Calcium
Calcium
is one of the most important elements in the
diet
because it is a structural component of bones, teeth, and soft tissues and is essential in many of the body's
metabolic
processes. It accounts for 1 to 2 percent of adult body weight, 99 percent of which is stored in bones and teeth. On the cellular level, calcium is used to regulate the permeability and electrical properties of
biological
membranes (such as cell walls), which in turn control muscle and nerve functions, glandular secretions, and blood vessel dilation and contraction. Calcium is also essential for proper
blood clotting
.
Because of its biological importance, calcium levels are carefully controlled ...
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