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Definition of «Calcium»


Calcium: A mineral found mainly in the hard part of bones, where it is stored. Calcium is added to bones by cells called osteoblasts and is removed from bones by cells called osteoclasts. Calcium is essential for healthy bones. It is also important for muscle contraction, heart action, nervous system maintenance, and normal blood clotting. Food sources of calcium include dairy foods, some leafy green vegetables such as broccoli and collards, canned salmon, clams, oysters, calcium-fortified foods, and tofu. According to the National Academy of Sciences, adequate intake of calcium is 1,200 milligrams a day (four glasses of milk) for men and women 51 and older, 1,000 milligrams a day for adults 19 through 50, and 1,300 milligrams a day for children 9 through 18. The upper limit for calcium intake is 2.5 grams daily.

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For More Information «Calcium»

  • Dietary Supplement Fact Sheet: Calcium - Office of Dietary ...

    Introduction. Calcium, the most abundant mineral in the body, is found in some foods, added to others, available as a dietary supplement, and present in some medicines ...

  • calcium: Definition from Answers.com

    Library > Literature & Language > Dictionary ( kăl ' sē-əm ) n. ( Symbol Ca ) A silvery, moderately hard metallic element that constitutes approximately ...

  • Calcium: At a Glance

    Overview of the calcium test, part of a routine metabolic panel to screen for a range of conditions

  • Calcium: MedlinePlus

    You have more calcium in your body than any other mineral. Calcium has many important jobs. The body stores more than 99 percent of its calcium in the bones and teeth ...

  • The Calcium Information Resource

    Calcium is essential to maintaining total body health. Your body needs it every day not just to keep your bones and teeth strong over your lifetime, but to ensure ...

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