Magnesium: normal range and what it means
Short answer: The normal magnesium range is 1.7 – 2.4 mg/dL for adults. In SI units that is about 0.7 – 1 mmol/L. Labs differ a little, so also check the range printed on your report.
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Information, not a diagnosis. Talk to a doctor about your result, and sooner if you feel unwell.
A mineral involved in 300+ reactions, including sleep and glucose.
Normal range
Adult reference range.
- Low< 1.7 mg/dL
- Normal1.7 – 2.4 mg/dL
- High≥ 2.4 mg/dL
What it measures
Serum magnesium, a cofactor in hundreds of enzyme reactions including muscle relaxation and blood-sugar control. Blood holds only about one per cent of your total, so a normal result does not rule out low stores.
What moves it
Nuts, greens and whole grains, alongside alcohol, some diuretics and gut absorption. Blood magnesium is a poor guide to total body stores — most of it sits in bone and cells.
How to bring it into range
Nuts, seeds, legumes and dark leafy greens. Glycinate and citrate are absorbed better than oxide and are gentler on the gut.
How fast it responds
Four to eight weeks.
Also reported as: serum magnesium · mg
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Common questions
- What is the normal magnesium range?
- The normal magnesium range is 1.7 – 2.4 mg/dL for adults. In SI units that is about 0.7 – 1 mmol/L. Labs differ a little, so also check the range printed on your report.
- What does a high Magnesium mean?
- A value above the reference band means Magnesium is outside the range typical for a healthy adult. A single reading is rarely conclusive on its own — what matters is the trend across draws and the other markers around it, which is why HealthOS reads the whole panel together rather than one number at a time.
- How do I improve my Magnesium?
- Nuts, seeds, legumes and dark leafy greens. Glycinate and citrate are absorbed better than oxide and are gentler on the gut.
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Reference ranges are general-population guidance compiled from common clinical laboratories, not a diagnosis. Lab-to-lab ranges differ. Always read your results with your doctor.