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A test for calcium in the blood checks the level of calcium in your body that is not stored in your bones. Almost all of the calcium in the body is stored in bone. The rest is found in the blood.
The body needs calcium to build and fix bones and teeth, to help nerves work, to make muscles squeeze together, to help blood clot, and to help the heart to work.
A blood calcium test may be done:
A blood calcium test can't be used to check for a lack of calcium in your diet. And it doesn't look for the loss of calcium from your bones (osteoporosis). The body can have normal calcium levels even if your diet doesn't have enough calcium in it. Other tests, such as a bone density test, check for the amount of calcium in your bones.
A health professional uses a needle to take a blood sample, usually from the arm.
Follow-up care is a key part of your treatment and safety. Be sure to make and go to all appointments, and call your doctor or nurse call line if you are having problems. It's also a good idea to keep a list of the medicines you take. Ask your doctor when you can expect to have your test results.
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Adaptation Date: 5/7/2021
Adapted By: Alberta Health Services
Adaptation Reviewed By: Alberta Health Services
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