All you need to know about testing Magnesium levels with a laboratory test
13.3% of people tested have Magnesium levels which are too high.
The average Magnesium result is 0.9 mmol/L
Note what is normal for you may differ for your age and sex.
Magnesium is a vital mineral involved in over 300 enzymatic reactions in the body. It's essential for bone health, nerve and muscle function, and maintaining a healthy immune system.
This test measures the level of magnesium in your blood and can help identify conditions such as hypomagnesemia (low magnesium) or hypermagnesemia (high magnesium), which can be indicative of various health issues.
By buying a laboratory test kit with professional nurse or clinic collection, you can accurately measure Magnesium for total reassurance.
Professional analysis in an accredited laboratory ensures rapid result delivery.
The Vitall Vitamins & Minerals Complete nurse or clinic test kit includes a Magnesium test and is available for just £99.00.
Tests which include a Magnesium test:
High magnesium levels (hypermagnesemia) are less common and are most often seen in people with reduced kidney function.
Excess magnesium can be associated with symptoms such as nausea, muscle weakness, and an irregular heartbeat.
This finding is generally treated as clinically significant and is often reviewed further to clarify the underlying cause. Depending on the cause and severity, it may be considered alongside factors such as medication changes, and dialysis in severe cases.
Low magnesium, also called hypomagnesemia, can be linked to poor dietary intake, chronic health conditions, and certain medications. It is often associated with symptoms such as muscle weakness, cramps, and abnormal heart rhythms.
Low magnesium is sometimes reviewed in the context of diet and the use of magnesium supplements, as part of a broader plan to correct the level.
Measure your Magnesium levels and fully identify & optimise nutritional deficiencies with a Vitamins & Minerals Complete nurse or clinic finger-prick bloodtest kit
You get the convenient testing with the reassurance of professional clinical analysis. Your results are delivered quickly & securely online.
This Vitamins & Minerals Complete Test is advised if you:
Dr. Shahzaib Ahmad MBBS, BSc, MRCP, FRCA, FFICM
Clinical Supervisor - Vitall|GMC 7495062|Profile
Reviewed on 03/02/2026
Next review due 03/02/2027
Review focus: Blood biomarkers, laboratory testing methodology, and biochemical interpretation.
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