This blood test measures the amount of calcium in the blood. Calcium is a very important mineral in the body and is needed to maintain healthy bones and teeth. Symptoms of unusually high calcium levels include: Increase need to urinate, vomiting/nausea, abdominal pain/constipation and more. Low calcium levels may cause: muscle cramping/spasms, irregular heartbeat and more.
Serum calcium is involved in the regulation of neuromuscular and enzyme activity, bone metabolism and blood coagulation.