The human body contains more calcium than any other mineral. For an average 130-pound adult, about 1,200 grams—almost 3 pounds—of the body is calcium. Your body composition, of course, depends on the size of your body frame; the density of your bones; and, if you're older, how much bone you've lost through aging.
Of that amount, about 99 percent of your body's calcium is in your bones. The remaining 1 percent is in your other body fluids and cells. Calcium is as important to you as an adult as it was during your childhood. The reasons really aren't that different.
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