A Calcium Blood Test measures the total amount of calcium in the blood. Calcium is one of the most important minerals in the body, essential for bone and teeth formation, muscle contraction, nerve signaling, blood clotting, and heart function. About 99% of the body’s calcium is stored in bones and teeth, while the remaining 1% circulates in the blood.
This test is used to screen for, diagnose, and monitor a range of conditions related to the bones, heart, nerves, kidneys, and teeth. It is commonly ordered as part of a routine metabolic panel or when symptoms such as muscle cramps, bone pain, fatigue, or kidney stones are present. Abnormal calcium levels may indicate parathyroid disorders, vitamin D deficiency, kidney disease, or certain cancers.
