The bones in the human body incorporate calcium into their structure. Bones, like other tissues in the body, are continually being reabsorbed and re-formed. Teeth are also calcified tissues. They incorporate calcium in their structure in a manner similar to bones. Calcium is essential for the formation of and maintenance of healthy teeth.
Calcium has other functions in addition to maintaining healthy teeth and bones.
Blood coagulation, transmission of nerve impulses, muscle contraction and relaxation, normal heart beat, stimulation of hormone secretion, activation of enzyme reactions, as well as other functions all require small amounts of calcium. Recommendations Calcium recommendations vary depending on age and special needs. In addition, levels of estrogen can affect calcium needs in women. The U.S. Department of Agriculture has a PDF file that lists these recommendations . Vitamin D is required for adequate amounts of calcium to be absorbed into the body, and for adequate calcium levels to be maintained.