A calcium blood test determines how much calcium is in your blood. One of the most vital minerals in your body is calcium. Calcium is required for strong bones and teeth. Calcium is also necessary for the nerves, muscles, and heart to operate properly. Your bones store nearly all of the calcium in your body. The remaining 1% circulates in the bloodstream. It could be an indication of bone illness, thyroid disease, renal disease, or other medical disorders if there is too much or too little calcium in the blood.
