Magnesium
Disclaimer: Information on this page is for educational purposes. Consult a physician to interpret your test results. Lissa Health helps track biomarker trends but does not replace medical advice.
What This Test Measures
Magnesium participates in >300 enzymatic reactions including neuromuscular function and cardiac rhythm.
Hypomagnesemia often coexists with hypokalemia and hypocalcemia — magnesium correction helps stabilize other electrolytes.
Serum magnesium may be normal with total body depletion.
Normal Ranges
| Group | Reference Range |
|---|---|
| Men | 1.6–2.2 mg/dL (0.66–1.07 mmol/L) |
| Women | 1.6–2.2 mg/dL |
| Children | 1.7–2.0 mg/dL |
Reference ranges may vary by laboratory and assay method.
Causes of High Levels
- Renal failure
- Excess supplements
- Lithium
- Addison disease
Causes of Low Levels
- Chronic alcoholism
- Diuretics
- Diarrhea
- Malnutrition
- Long-term proton pump inhibitors
Test Preparation
- No special preparation
- Report diuretics and PPIs
Related Biomarkers
| Biomarker | Relationship |
|---|---|
| Potassium | Often decreased together |
| Calcium | Neuromuscular function |
| Creatinine | Renal handling |
FAQ
How often should I take this test?
With diuretics and arrhythmias — as directed.
What should I do if my result is abnormal?
Symptoms (tetany, arrhythmia) with low Mg — IV correction in hospital.
Last updated: June 2026