Magnesium Test

Magnesium Test

Electrolytes are necessary for basic cell function and help the body perform and maintain important processes. Magnesium is an electrolyte responsible for proper muscle, nerve, and heart function, and helps to control blood pressure and blood sugar in the body. Read more
Test details

Sample type:
Fasting is not required for this test. If you are taking vitamins, or a vitamin supplement, containing magnesium, you should consult your doctor to determine if you should stop taking them for at least one week before your sample is collected.
Test type: In Person
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+ $6.00 Physician Service Fee
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What Icon
This test measures the level of magnesium in your blood.
Who Icon
Anyone who wants to assess their levels of magnesium or is having symptoms that could be related to a magnesium imbalance. Must be 18+ years of age to purchase.
How Icon
Schedule an appointment, then visit one of the Quest Diagnostics Patient Service Centers.
About the Test

This test can help determine the amount of magnesium you have in your blood. Low levels cause a magnesium deficiency (hypomagnesemia) and is more common than high levels (hypermagnesemia). Magnesium is critical to maintain proper muscle and brain function. It also helps turn nutrients into energy at the cellular level. Health problems that may cause a magnesium deficiency include malnutrition, alcoholism, and diabetes.

When electrolytes are imbalanced, normal bodily functions are disrupted and can cause life threatening complications. By testing your magnesium levels, you and your healthcare provider may be able to better understand the cause of your symptoms and identify next steps.

Take an in-person test at a Quest Diagnostics location.
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1. Purchase your test
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2. Visit a location
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3. Get results online
We will email you when your confidential results are available. 

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After your purchase, schedule an appointment at a nearby Quest Diagnostics location and have your specimen sample collected by a trained healthcare professional.

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Access test results from your phone as soon as they’re available, with the option to discuss your results with an independent physician at no extra cost.