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Magnesium, RBC Blood Test

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

The Purpose of a Magnesium RBC Test

Magnesium is an essential mineral that your body simply can’t function without. A deficiency puts you at risk for weak bones, poor metabolism, kidney disorders, and irregular heart or muscle function, among other issues. If left unchecked, it can lead to serious problems such as heart disease, diabetes, high blood pressure, and osteoporosis. It’s important to get enough magnesium in your diet, but even then, other factors can contribute to a deficiency, such as certain medications or conditions such as diabetes or Crohn’s disease. That’s why it’s important to get an RBC magnesium test if you are concerned about your levels.

Magnesium, RBC (623)

What Does the RBC Magnesium Blood Test Measure?

This test assesses how much magnesium is in your red blood cells to determine if there is a deficiency.

Who Should Take an RBC Magnesium Test?

There are several symptoms that are associated with inadequate magnesium levels, such as:

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

If you have these symptoms, or a medical condition that raises your risk of deficiency, then you should look into a red blood cell magnesium test to check your levels.

Red Blood Cell Magnesium Test Preparation

You don’t need to do anything special before taking an RBC magnesium lab test.

Magnesium RBC Test Results

The ideal range for your magnesium RBC results should be 4.2 to 6.8 mg/dL, although those numbers may vary depending on the lab and the test. If your results fall outside that range, your doctor may order more testing or ask you to consider lifestyle modifications such as including more magnesium-rich foods in your diet. (Women need 310 to 320 mg of magnesium each day, and men need 400 to 420 mg.) We can help you figure out the next best steps for your health; just schedule a telehealth visit with one of our board-certified physicians.

Where Can I Get an RBC Magnesium Blood Test Near Me?

Use our vitamin and nutrition tests to support an optimal state of wellness and balance. Personalabs gives you the ease and convenience of ordering your tests online at any time, so you can monitor your health consistently and be proactive in your decision-making. Here’s how it works:

Step 1: Shop our more than 400 health tests. (You may not need a doctor’s sign-off beforehand, depending on the state where you live.) The test will come with a lab order, which you need to download for your testing appointment.

Step 2: Use our location tool to find a Labcorp or Quest Diagnostics facility close to you. (That should be easy to do; you have access to more than 4,000 locations across the country.)

Step 3: Go to the lab for your blood work and bring the test order with you.

Step 4: See your test findings in your private Personalabs portal. Results usually arrive within 2 to 10 business days, but we can help if you require a specific turnaround time. Contact us to learn more.

Make Personalabs your partner in maintaining a vibrant state of health. Browse our collection of tests today.

Additional information



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Generate & Print Out Lab Order

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



Visit the Lab

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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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