Cortisol, serum, afternoon/evening — lab reference
In the reference guideTime-specific and assay-specific.
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What’s searchable?Time-specific and assay-specific.
Collect at a defined time. Assay-specific; dynamic testing may be required.
Normal serum magnesium does not exclude tissue depletion.
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.
Serum chemistry value. Do not substitute arterial blood-gas bicarbonate ranges.
Acute-phase reactant; interpret with serum/urine copper and clinical context.
Collect 7-10 AM with proper chilled handling. Interpret with concurrent cortisol.
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