Immunoglobulin G (IgG) — lab reference
In the reference guideAge and assay-specific. Ask your clinician to consider subclasses or electrophoresis when indicated.
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What’s searchable?Age and assay-specific. Ask your clinician to consider subclasses or electrophoresis when indicated.
Normal <140; prediabetes 140-199; diabetes ≥200.
Age and assay-specific. Important when interpreting IgA-based celiac testing.
Age and assay-specific.
Ask your clinician to consider altitude and iron/B12/folate status. Pregnancy requires trimester-specific ranges.
Analyzer-specific; hemolysis and cold agglutinins may interfere.
Inflammation, hydration, liver synthesis, renal loss, and nutrition affect result.
Ask your clinician to review albumin, globulin, and electrophoresis when indicated.
Often calculated. Ask your clinician to consider SPEP/IFE for unexplained abnormalities.
Affected by thyroid-binding globulin, pregnancy, estrogen, and medications.
Morning fasting collection is preferred when practical. Day-to-day variation is substantial.
Ask your clinician to read this result with iron, transferrin saturation, and ferritin.
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