Total IgA Test
An antibody that defends mucosal surfaces (gut, airways). Used to evaluate immune deficiencies and validate other antibody tests.
What is Total IgA?
An antibody that defends mucosal surfaces (gut, airways). Used to evaluate immune deficiencies and validate other antibody tests.
Total IgA Reference Range
These are the typical adult reference ranges used by major US labs. Your report will include the specific range used by the lab that processed your sample.
| Population | Range |
|---|---|
| age 18+ | 70.0 – 400 mg/dL |
Reference ranges are educational. Always interpret your result with the specific range printed on your lab report and discuss anything outside the range with a clinician.
What your Total IgA result may mean
IgA deficiency can affect interpretation of other antibody tests (like tTG-IgA for celiac).
Educational only — not a diagnosis. Many factors can influence a single result. Discuss anything that concerns you with a healthcare provider.
Sources
Related Inflammation & Autoimmune biomarkers
Markers commonly tested alongside Total IgA.
Frequently asked
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