Calcium blood test

What is being tested? Almost all the calcium in your body is found in your bones. The rest of it is found in your blood. This test is to find out if your blood calcium is at normal levels. Calcium is important because it is needed for strong bones. Your muscles, nerves and heart also need calcium to work properly. Calcium is needed for your blood to clot. You lose some calcium every day in your urine. Your doctor might also test your urine (pee) to find out how much calcium your kidneys are removing. Why would I need this