Calcium is an essential mineral for the body, playing a role in numerous processes including bone formation, muscle contraction, nerve impulse transmission, and hormone secretion. Calcium is regulated in the body by homeostatic mechanisms that ensure the body has enough calcium for its needs and does not become overloaded. This is accomplished in part by hormones secreted by the parathyroid gland, which can increase or decrease the amount of calcium in the bloodstream. Calcium is also regulated by the diet, with an adequate intake of calcium-rich foods necessary for good health.
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