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Magnesium (red cell) Blood Test
Magnesium (red cell) Blood Test
Magnesium (red cell) Blood Test
Magnesium (red cell) Blood Test

Magnesium (red cell) Blood Test

A test to measure the amount of magnesium in your red blood cells.

Is it for you?

Do you simply want to check that you are getting enough of this important mineral? Do you have symptoms like eye twitching and spasms that you think might be related to low magnesium? Or are you taking supplements and want to check that your levels are optimal? If you want a sensitive test for magnesium levels, then this is the right test for you.
Blood sample 18 biomarkers included 3 working days turnaround

What's included?

Biomarker profiles

  • Minerals
  • Clotting Status
  • Red Blood Cells
  • White Blood Cells
  • Other

Minerals (1 Biomarker)

Clotting Status (2 Biomarkers)

Red Blood Cells (7 Biomarkers)

White Blood Cells (6 Biomarkers)

Other (2 Biomarkers)

Special instructions

Please stop any supplementation at least seven days before testing.

Magnesium is an important mineral needed for proper muscle, nerve, and enzyme function. It also helps the body make and use energy and is needed to move other electrolytes (potassium and sodium) into and out of cells. Most of the magnesium in the body is found in the bones and inside the cells. Only a tiny amount of magnesium is normally present in the blood, most of which is contained in the red cells.


Magnesium is found in fibre-rich foods such as green leafy vegetables, avocados, bananas, wholemeal bread and brown rice as well as in fish and meat. Excess magnesium exposure can cause breathing problems, skin and eye irritation, flu-like symptoms and an upset stomach. Low magnesium can cause muscle aches and pains, fatigue, osteoporosis, an irregular heart beat and high blood pressure. Low magnesium is associated with heart disease, artherosclerosis, stroke and diabetes.


The body regulates serum magnesium by pulling magnesium from the red cells when levels are low. This means that serum magnesium can show normal levels even when magnesium in red cells is depleted. This means that the magnesium red cell test can be a more sensitive measure of magnesium status.

Dr Sam Rodgers MBBS, MRCGP

How it works

  • Take the test

    Collect your sample at home, visit a partner clinic, or we can even send a nurse to you.
  • Post your sample

    Send your sample back on the same day you take it in the freepost pack to our laboratory.
  • Get your results

    View your results with doctor's advice on your personal dashboard.
Laboratories you can trust

Laboratories you can trust

Trusted by the NHS and private clinics alike, you can be sure of the highest testing standards from our fully accredited partner laboratories.

Expert interpretation <br>
of your results

Expert interpretation
of your results

One of our team of doctors will review your results and give you personalised advice based on your medical history, lifestyle and health and fitness goals.

Your personal<br>
health centre

Your personal
health centre

Discover the easy way to track your health through our online portal, my.medichecks.com. View your results with doctor's advice, monitor any changes over time and see the improvements you can make to your health with simple lifestyle changes.

Questions? Let us help

Questions? Let us help

Our customer care team is on-hand to help you find the test that's right for you. Get in touch via phone, live chat or email.

What our customers say

We ask every Medichecks customer about their experience - read what they have to say

Important

Our tests are not a substitute for seeing your doctor, especially if you are suffering symptoms. Our doctors will interpret your results based on the information you have provided, but will not diagnose, consult or provide any treatment. You will be advised to see your doctor for any necessary follow-up action.