Magnesium, serum — lab reference
In the reference guideNormal serum magnesium does not exclude tissue depletion.
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What’s searchable?Normal serum magnesium does not exclude tissue depletion.
No universal interval across methods. Record exact performing-lab method and range.
Measured and calculated values may differ. Review osmolal gap when indicated.
Morning fasting collection is preferred when practical. Day-to-day variation is substantial.
<4.0 suggests deficiency. Recent intake or supplementation may raise serum values.
Fasting, time of day, inflammation, albumin, and trace-metal collection technique matter.
Estrogen, pregnancy, inflammation, liver function, and ceruloplasmin affect values.
Trace-metal collection and geographic/dietary context matter.
Collect at a defined time. Assay-specific; dynamic testing may be required.
Time-specific and assay-specific.
Serum chemistry value. Do not substitute arterial blood-gas bicarbonate ranges.
Acute-phase reactant; interpret with serum/urine copper and clinical context.
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