What is the reference range for Magnesium (Blood)?

The standard reference range for Magnesium (Blood) is ZRT laboratory-specific; typically 1.7–2.3 mg/dL (0.7–0.95 mmol/L).. Reference ranges vary by laboratory and assay platform — interpret in context of the issuing laboratory's stated range.

Which tests measure Magnesium (Blood)?

Magnesium (Blood) is measured in 1 test on BiomarkersLabs.com, including Blood Spot + Dried Urine ICPMS Toxic and Essential Elements.

Biomarker Reference · Mg

What does the Magnesium (Blood) test measure?

Q: Why is Magnesium (Blood) measured?

Blood magnesium is insensitive for detecting marginal deficiency but is useful for identifying overt hypomagnesaemia in hospitalised or at-risk patients (diuretics, proton-pump inhibitors, alcohol use, gastrointestinal losses). Functional practitioners may order additional markers (ionised magnesium, red-cell magnesium) when clinical suspicion is high despite a normal result.

Magnesium (Blood) (Mg) is a clinical biomarker used in heavy-metals-toxicology assessment. Magnesium is predominantly intracellular; serum or plasma represents <1 % of total body stores and is homeostatically defended, so normal blood magnesium does not exclude tissue depletion. It is measured in 1 laboratory test on BiomarkersLabs.com.

Reference Range: ZRT laboratory-specific; typically 1.7–2.3 mg/dL (0.7–0.95 mmol/L).
Units: mg/dL, mmol/L
Measured In: 1 test
Category: Heavy Metals

Functional medicine optimalSome functional sources suggest targeting >2.0 mg/dL, though the evidence base for optimal blood thresholds beyond preventing overt deficiency is observational.

What is Magnesium (Blood)?

Magnesium is predominantly intracellular; serum or plasma represents <1 % of total body stores and is homeostatically defended, so normal blood magnesium does not exclude tissue depletion. Dried-blood-spot magnesium reflects the cellular fraction to some extent, offering a closer approximation to tissue status than serum alone.

Why is Magnesium (Blood) measured?

Blood magnesium is insensitive for detecting marginal deficiency but is useful for identifying overt hypomagnesaemia in hospitalised or at-risk patients (diuretics, proton-pump inhibitors, alcohol use, gastrointestinal losses). Functional practitioners may order additional markers (ionised magnesium, red-cell magnesium) when clinical suspicion is high despite a normal result.

Reference ranges

Standard reference: ZRT laboratory-specific; typically 1.7–2.3 mg/dL (0.7–0.95 mmol/L).
Functional medicine optimal: Some functional sources suggest targeting >2.0 mg/dL, though the evidence base for optimal blood thresholds beyond preventing overt deficiency is observational.
Units: mg/dL, mmol/L

Reference ranges vary by laboratory and assay platform. Interpret in context of the issuing laboratory's stated range.

Tests that measure Magnesium (Blood)

1 test on BiomarkersLabs.com include this biomarker.

BML-HMT-009Comprehensive

Blood Spot + Dried Urine ICPMS Toxic and Essential Elements

Magnesium (Blood) reference range in this test: ZRT laboratory-specific; typically 1.7–2.3 mg/dL (0.7–0.95 mmol/L).

Related clinical conditions

Related Biomarkers

Frequently measured alongside

Mercury (Blood)Hg3 tests Lead (Blood)Pb3 tests Cadmium (Blood)Cd4 tests Arsenic (Urine)As3 tests Selenium (Blood)Se2 tests Zinc (Blood)Zn3 tests Copper (Blood)Cu3 tests Iodine (Urine)I2 tests

Order tests measuring Magnesium (Blood) for your patients

Available exclusively to verified licensed healthcare practitioners. CLIA-certified laboratory results delivered to your secure portal.