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  • Packaging of the Magnesium Test from Cerascreen
  • Contents of the Magnesium Testkit from Cerascreen: Packaging, instructions, lancets, plaster, dry blood card, disinfection wipe, return envelope
  • Woman looks at smartphone showing results of Magnesium Test
Magnesium Test
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Magnesium Test

Free shipping as of £90,00
Delivery in 2 - 5 days
Quality tested by cerascreen
420,000+ satisfied customers
Please only take and send in your sample between Sunday and Tuesday and take into account any public holidays.

About the test

Want to take your health into your own hands and check your magnesium levels? This self-test is the cerascreen® Mineral Test. When you take this test, a sample of your blood is tested for magnesium, selenium and zinc levels in your capillary blood – this is all included in the price. This allows you to identify a potential deficiency in the most important minerals and take targeted action to correct it.

Those who consume too little magnesium in the long term run the risk of developing a magnesium deficiency. Possible consequences of a magnesium deficiency range from calf cramps, fatigue and nausea to depressive moods and a higher risk of cardiovascular diseases.

Magnesium Test

  • Take your sample at home – conveniently and discreetly
  • Receive a state-of-the-art laboratory analysis
  • Benefit from ​​specific recommendations to prevent magnesium deficiency
  • Receive the result within a few days after your sample’s arrival at the laboratory

Benefits of the Magnesium Test

According to the German federal centre of nutrition, 20 per cent of people in Europe consume too little magnesium. If this leads to a permanent magnesium deficiency, you can develop fatigue, nausea and depressive moods, and you will be at greater risk of developing cardiovascular disease.

With the help of your test results, you can optimise your magnesium levels in a targeted way. If you take too much magnesium, this may result in a magnesium surplus. If you take a very high dose, you may develop diarrhoea, gastrointestinal discomfort and even a drop in blood pressure.

For the cerascreen® Mineral Test you do not have to go to a doctor’s office or clinic – you can do it comfortably at home with the test kit and instructions provided.

Benefit from our expertise: cerascreen® is the market leader for medical sampling and submission kits in Europe, with eight years of experience in test development and analysis. We have developed more than 50 approved send-in test kits (medical devices), evaluated 250,000 samples and serve 19 countries in Europe – and now the United States.

Results Magnesium Test

Result of the Magnesium Test

As soon as your sample has been analysed, you will receive your results report via the My cerascreen® app or your user account on our website. You can easily view the report on your smartphone, tablet or computer and print it out, if required.

Find out your blood levels of the minerals zinc, magnesium and selenium in the laboratory analysis. Learn how to optimise mineral levels that are too low or too high through our clear recommendations. Learn more about the effects of zinc, magnesium and selenium – and how much you should take if you choose to use supplements.


Frequently asked questions about Magnesium Test

Why should I test my magnesium levels?

A magnesium deficiency often develops over a long time only through very vague symptoms or, in some cases, through no symptoms at all. In other words, you usually don’t notice if you have a magnesium deficiency.

Nevertheless, it can disrupt your everyday life, especially if your body permanently receives too little magnesium. You often feel tired, sluggish and depressed, suffer from headaches more often and are restless and unable to concentrate. And in the long term, a magnesium deficiency can even damage your kidneys and blood vessels.

However, if you take high doses of magnesium supplements because you suspect you may have a deficiency, this can have side effects and even be harmful to your health. Mineral supplements are only recommended if there really is a mineral deficiency.

A blood test such as the cerascreen® Magnesium Test will tell you whether this is the case. The laboratory analysis shows you the state of your magnesium reserves – and whether a change in diet or supplements would make sense. The test also determines the concentration of the minerals zinc and selenium.

Who should take the Magnesium Test?

Checking a possible deficiency is worthwhile for many people, as it is hard to consume enough magnesium in our diets. A magnesium deficiency test is particularly useful if you belong to one of the following risk groups for a deficiency:

  • People who do intensive sports, as they lose a lot of zinc through sweat.
  • Vegetarians and vegans.
  • Pregnant and breastfeeding women, as they also have to supply their foetus or infant with minerals.
  • People with chronic inflammatory bowel diseases.

How does the Magnesium Test work?

For the Magnesium Test, take a small blood sample from your fingertip using a lancet. The sample is sent in a tube via a return envelope to a specialist diagnostics laboratory.

The diagnostic laboratory then analyses the concentration of the minerals magnesium, selenium and zinc in your blood.

What does the results report tell me?

The detailed results report reveals the measured values of minerals in your blood retrieved from the laboratory analysis.

You will learn how high the concentration of the mineral magnesium is in your blood. The value is measured in milligrammes per litre (mg/l).

You will also find out how much zinc in millimoles per litre (mmol/l) and selenium in microgrammes per litre (μg/l) were detected in your blood.

You will receive the reference values – that is, the ranges of values within which your mineral concentrations should ideally be.

The report provides you with valuable information about magnesium, magnesium deficiency and the other minerals. You will learn how to optimise your diet and supplement intake to improve your magnesium levels through clear recommendations.

What is magnesium?

Magnesium is a mineral that your body needs for numerous important processes. It is involved in the following tasks:Muscle development and functionMetabolismBone and teeth developmentNervous systemHeart function and heartbeat

Magnesium is an essential – that is, an indispensable mineral. This means that the body cannot produce it itself and you have to take it in through your diet. We store 60 per cent of magnesium in our bones and 25 to 30 per cent in our muscles.

What causes magnesium or mineral deficiency?

A magnesium deficiency can be caused by two factors:1. You do not consume enough magnesium in your diet. This can be the case with an unbalanced diet, especially if you eat very little fruit and vegetables and hardly any wholegrain products.2. Your body needs more magnesium because you consume more of the mineral or your body absorbs it less easily from food. This is the case, for example, with pregnant women, competitive athletes and people with intestinal diseases.If you do need to increase your magnesium intake, you can make sure to consciously include magnesium-rich foods in your diet, such as magnesium-rich mineral water, wholegrain products, vegetables and nuts.

What are the symptoms of mineral deficiency?

Magnesium deficiency can lead to the following symptoms, among others:

Tiredness, exhaustion and feeling of weaknessWeakness in performance and lack of concentrationLoss of appetite, nausea and vomitingMuscle cramps and twitching, numbness in the hands and feet

In the long term, a magnesium deficiency can cause cardiac arrhythmia and heart pain.

Which foods contain magnesium?

Magnesium is mainly found in plant-based foods, nuts, vegetables, pulses and wholemeal products. Pumpkin and sunflower seeds, quinoa and oats are also very rich in magnesium.Meat, fish, dairy products and certain fruits such as berries and bananas also contain magnesium.We also consume a large part of our magnesium requirement via liquids, such as mineral water, coffee and tea. Magnesium-rich mineral water is one of the main sources of magnesium in Europe.

If you have noticed a deficiency, you can also resort to nutritional supplements with magnesium.

What happens when your magnesium levels are too high?

It is possible to consume too much magnesium. But don’t worry: you won't develop a magnesium surplus from your normal diet. With food supplements, however, you can develop one, which can lead to unpleasant side effects.

For this reason, professionals recommend that you should not take more than 250 milligrams of magnesium a day in food supplements.

Symptoms of a magnesium surplus include diarrhoea and other forms of gastrointestinal discomfort. Above a dose of 2,500 milligrams, you may be at risk of magnesium poisoning, which can be accompanied by dangerous drops in blood pressure and muscle weakness.

You should generally only take mineral supplements for a longer period of time if you have confirmed a deficiency of the mineral through a test.

Who should NOT take the Magnesium Test?

The Magnesium Test is not or only partially suitable for certain groups of people:

People with infectious diseases, like hepatitis and HIV, may not use the Magnesium Test.

People with haemophilia should not take the test.

Pregnant and breastfeeding women should only take the Magnesium Test under medical supervision. The given reference ranges and recommendations do not apply to people in this group; consult your medical professional for advice concerning your test results.

The Magnesium Test is not intended for children under 18 years of age.

The test is not intended for diagnosing illnesses or disease. For example, if you suffer from depression or are in physical pain, consult a doctor.

Why are children under 18 not allowed to take the test?

Our tests are not suitable for underage children and adolescents under the age of 18. Under 18s cannot activate the tests online and therefore cannot receive a test result. We ask that you do not administer the tests to your children either.

Children and adolescents need much closer supervision and counselling regarding medical tests and their interpretation. Testing with lancets and chemicals is not without risk and would need to be closely supervised by guardians. In addition, the reference values we give are always based on adult data. In the case of children, the risk of misinterpreting the results would be very high.

We want to fulfil our responsibility as a provider of medical products and ensure that children and adolescents are not unsettled by measurement results that are difficult for them to interpret. Since we cannot control whether the minors' legal guardians actually consent to the test being carried out and supervise them, we exclude tests for under 18s altogether.

If you are under 18 and have purchased a test, please contact our customer support.

Why does it take up to a week for the sample to reach the lab?


Please bear in mind that your results will not be analyzed in the UK but in Germany. For that reason, it can take up to a week for the sample to arrive at the lab. This does not affect the stability of the samples, as the method we are using is optimized for long transports.

Initially, your sample is sent to our collection center in the UK. From there, it is shipped to our central sample sorting facility in Germany, which then distributes samples to our partner laboratories. Once your sample is analyzed there, you will receive a notification and can access your result online.

Please check your mailbox regularly. We will notify you as soon as your sample is sent, arrives, or is analyzed.

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This is how it works

1. Test at home

Your test kit contains everything you need to draw a small sample of blood from your fingertip. Then send the sample back to us free of charge in the enclosed return envelope.

2. View results online

After the evaluation in the medical specialist laboratory, you will have online access to your personal result report.

3. Act

Your access to the test results and the evidence-based findings and tips to improve your health: the my cerascreen® user profile on our website or our app.

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