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Minerals

Magnesium

Magnesium deficiency is widespread and often undetected. Proactive testing helps ensure adequate levels for heart, muscle, and nerve health.

Doctor's Assessment Included

Reference Ranges

See the value that applies to you:

Choose male or female — this range differs by sex.

Enter your age — this range changes with age.

This range also depends on context such as cycle phase or sample material; the highlighted rows apply to your group.

Your reference range
mmol/l
0,71 0,98 mmol/l
Reference ranges by group, in mmol/l
6 years and older 0,71–0,98 mmol/l
0,71 0,98
0,71 0,98 mmol/l

Source: NVKC Reference population: Nederlandse huisartsenpopulatie (NUMBER, n=7.574.327)

Reference ranges may vary between laboratories. When you order a test, a BIG-registered doctor assesses your personal results in context. For treatment decisions, discuss your results with your GP.

Check your own value

What It Measures

This test measures the level of magnesium in your blood serum. Since most magnesium is stored inside cells and bones, serum levels may not fully reflect total body magnesium status.

Why It Matters

Magnesium supports heart rhythm, muscle relaxation, nerve signalling, and bone health. Deficiency is common and may be associated with muscle cramps, fatigue, and cardiovascular issues. Consult your healthcare provider for personalised advice.

When to Test

Testing may be recommended if you experience muscle cramps, weakness, heart palpitations, or sleep difficulties. Active individuals and those with restricted diets may benefit from regular magnesium monitoring.

Symptoms

Low Levels

Symptoms of low magnesium may include muscle cramps, twitching, fatigue, weakness, irritability, sleep disturbances, and heart palpitations.

High Levels

High magnesium is uncommon in healthy individuals but may cause nausea, low blood pressure, muscle weakness, and in severe cases, breathing difficulties. It is usually related to kidney impairment or excessive supplementation.

Recommendations

Male

If Low

Low magnesium may cause muscle cramps, fatigue, and heart palpitations. Consider magnesium glycinate supplementation (400 mg daily).

If High

High magnesium is rare but may indicate kidney dysfunction or excessive supplementation. Reduce supplement intake.

Female

If Low

Low magnesium may cause muscle cramps, PMS, and fatigue. Consider magnesium glycinate supplementation (300-400 mg daily).

If High

High magnesium is rare but may indicate kidney dysfunction or excessive supplementation. Reduce supplement intake.

Lifestyle Tips

Include magnesium-rich foods such as dark leafy greens, nuts, seeds, whole grains, and dark chocolate. Reducing stress and limiting alcohol and caffeine may also support magnesium levels.

Frequently Asked Questions

Why is magnesium deficiency so common?
Modern diets often lack magnesium-rich foods, and factors like stress, alcohol, and certain medications can deplete magnesium. Soil depletion has also reduced magnesium content in some crops.
Can magnesium help with sleep?
Magnesium may support relaxation and sleep quality due to its role in nervous system regulation. Consult your healthcare provider for guidance on supplementation.
Which form of magnesium is best?
Different forms have different absorption rates and uses. Your healthcare provider can recommend the most appropriate form based on your specific needs.

Test Products

This marker is included in the following test panels.

InsideTracker

A 36-biomarker performance and longevity panel inspired by InsideTracker Ultimate — covering heart, hormones, metabolism, inflammation, recovery and iron status.

SHBG (Sex Hormone Binding Globulin) TSH (Thyroid Stimulating Hormone) ALT (Alanine Aminotransferase) LDL Cholesterol GGT (Gamma-Glutamyl Transferase) Cortisol DHEA-S Estradiol (E2) Free Testosterone Total Testosterone Folate (Folic Acid) Vitamin B12 Calcium Ferritin Iron (Serum) Magnesium Magnesium (Intracellular) Potassium Progesterone Sodium Transferrin CRP (C-Reactive Protein) Glucose (Fasting) HbA1c (Glycated Hemoglobin) ApoB (Apolipoprotein B) HDL Cholesterol Total Cholesterol Albumin AST (Aspartate Aminotransferase) Vitamin D (25-OH) Insulin (Fasting) Leukocyte Differential Creatine Kinase (CK) Transferrin Saturation Triglycerides Basic Blood Count
€399,-

Whoop

A 44-biomarker comprehensive health panel inspired by WHOOP Advanced Labs — a deep look at metabolism, cardiovascular risk, hormones, liver, kidney and inflammation.

SHBG (Sex Hormone Binding Globulin) TSH (Thyroid Stimulating Hormone) ALT (Alanine Aminotransferase) LDL Cholesterol Cortisol DHEA-S Estradiol (E2) Free Testosterone FSH (Follicle Stimulating Hormone) LH (Luteinizing Hormone) Total Testosterone Bicarbonate Calcium Chloride Ferritin Iron (Serum) Magnesium Potassium Sodium Transferrin CRP (C-Reactive Protein) Homocysteine Glucose (Fasting) HbA1c (Glycated Hemoglobin) ApoB (Apolipoprotein B) HDL Cholesterol Omega-3 Index Total Cholesterol Albumin HOMA-IR ALP (Alkaline Phosphatase) AST (Aspartate Aminotransferase) Bilirubin (Total) Total Protein Urea (BUN) Creatinine Vitamin D (25-OH) eGFR (Estimated Glomerular Filtration Rate) Insulin (Fasting) Leukocyte Differential Transferrin Saturation Lipoprotein(a) Triglycerides Basic Blood Count
€499,-

Magnesium

€12,-