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Magnesium Test


 What is the magnesium test?
 Why is this test done?
 How do I prepare for this test?
 How is the test done?
 What does the test result mean?
 What if my test result is not normal?

What is the magnesium test?

This test measures the amount of magnesium in your blood. Magnesium is a very important nutrient for your body. For example, your nerves, digestive system, and heart all need it to work well. You can get magnesium from food and supplements.

Why is this test done?

This test may help diagnose and treat a medical problem you are having. It does not diagnose a specific problem but it can help your healthcare provider know what other tests you might need. It’s also a way to see how well treatment for a disease is working.

How do I prepare for this test?

How is the test done?

Having this test will take just a few minutes. A small amount of blood is taken from a vein in your arm with a needle. The blood is collected in tubes and sent to a lab.

Ask your healthcare provider when and how you will get the result of your test.

What does the test result mean?

Some of the reasons your magnesium level may be higher than normal are:

Some of the reasons your magnesium level may be lower than normal are:

What if my test result is not normal?

Test results are only one part of a larger picture that takes into account your medical history, physical exam, and current health. Sometimes a test needs to be repeated to check the first result. Talk to your healthcare provider about your result and ask questions, such as:

If your magnesium level is low, your provider may recommend supplements to bring it back up.

healthinformatics info

Reference Sources:

Labtestsonline.org. Magnesium. 4/2010. Accessed 9/2013 from http://labtestsonline.org/understanding/analytes/magnesium/tab/ask.


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Last Modified: 2013-10-18

Last Reviewed: 2013-10-10

Website Updated: March 2014

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Published by RelayHealth. © 2014 RelayHealth and/or one of its affiliates. All Rights Reserved.

This content is reviewed periodically and is subject to change as new health information becomes available. The information is intended to inform and educate and is not a replacement for medical evaluation, advice, diagnosis or treatment by a healthcare professional.


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