A serum calcium blood test measures the total calcium in your blood. There are several different forms of calcium in your blood. These include ionized calcium, calcium bound to other minerals called anions, and calcium bound to proteins like albumin. Ionized calcium, also known as free calcium, is the most active form.
It may be important to know your ionized calcium levels if you have abnormal levels of proteins, such as albumin, or immunoglobins in your blood.
A blood test to check the amount of calcium present in the blood is taken
Higher than normal calcium levels, it may indicate Hyperparathyroidism, Paget’s disease of the bone, Overuse of antacids that contain calcium, Excessive intake of calcium from vitamin D supplements or milk, Certain types of cancer. Lower than normal calcium levels, it may indicate, Hypoparathyroidism, a condition in which your parathyroid glands produce too little parathyroid hormone, Vitamin D deficiency, Magnesium deficiency, Inflammation of the pancreas (pancreatitis), Kidney disease.