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Magnesium Blood Test

* This is not a home test kit. You will need to visit a local lab for testing.

Also Known As

Mag, Mg, Magnesium-Serum

The Purpose of a Magnesium Test

Your body thrives on magnesium. It’s an important mineral that’s essential for many functions, which is why a deficiency shouldn’t be ignored. If left untreated, poor magnesium levels raise your risk for brittle bones, slow metabolism, and kidney, heart, or muscle issues, as well as serious health concerns such as heart disease, diabetes, arrhythmia, high blood pressure, and osteoporosis.

Factors that can contribute to magnesium deficiency include a poor diet, alcohol use disorder, certain medications, or diabetes, Crohn’s disease, and other health conditions. Magnesium level tests can help you stay proactive and make sure your body has what it needs to remain healthy.

Magnesium, Serum (622)
Magnesium, Serum (001537)

What Does the Mg Blood Test Measure?

This test measures the body’s magnesium level.

Who Should Take a Magnesium Lab Test?

Testing may be recommended if you are experiencing symptoms linked to inadequate magnesium levels, such as:

  • Appetite loss
  • Nausea
  • Fatigue
  • Muscle weakness or spasms

A magnesium blood test is also helpful to monitor your levels if you have a medical condition or take medication that can raise the risk of deficiency.

Magnesium Level Test Preparation

There are no special instructions for taking a magnesium test.

Mg Blood Test Results

The normal range for magnesium lab test results is 1.7 to 2.2 mg/dL, although there may be slight variations depending on the lab. Your doctor may order some more tests, like the RBC magnesium test, or suggest lifestyle modifications, such as including more magnesium-rich foods in your diet if your levels aren’t where they should be. (Recommended daily magnesium intake is 310 to 320 mg for women and 400 to 420 mg for men.) Need more guidance? Schedule a telehealth appointment with one of our board-certified doctors.

Where Can I Get a Magnesium Blood Test Near Me?

Our wide array of vitamin and nutrition tests gives you valuable data you can use to support your overall wellness. With Personalabs, you enjoy the ease and convenience of ordering tests online so you can take a preventive and proactive approach to your health. Here’s how it works:

Step 1: Buy your desired test. (You may not need a doctor’s approval prior to purchase, depending on the state where you live.) Download the lab order that comes with the test so you can bring it to your blood draw.

Step 2: Use the Personalabs location tool to find a Labcorp or Quest Diagnostics facility near you from more than 4,000 locations across the country.

Step 3: Bring the lab order to the blood draw and complete your testing.

Step 4: View your test report in your secure Personalabs portal. Results usually arrive within 2 to 10 business days, but we can help if you have a specific turnaround time. Contact us for more information.

Browse our collection of tests today and take the first step toward gaining more control over your healthcare choices. Shop online, or reach out to our customer service team with any questions.

Additional information


LabCorp, Quest

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Order Your Test

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Generate & Print Out Lab Order

Our physician network will approve your order within 2-4hrs.



Visit the Lab

The test price decides which lab you will visit: Quest or Labcorp. Find a location in your area.



Get Your Results

Results can be provided in as little as 24-48 hrs. For more complex tests, please contact us for turn around times.


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