Antibodies against thyroglobulin; used when assessing autoimmune thyroid disease.
What it is
Thyroglobulin antibodies (TgAb) may be present in autoimmune thyroid conditions. Cut-offs are assay-specific.
Why it matters
A positive result is not the same as thyroid failure: read with TSH, free T4/T3, and symptoms.
This guide is educational only and cannot diagnose you. Discuss results, especially anything outside your laboratory’s reference interval, or that does not match how you feel, with a GP or other appropriately qualified clinician.
How it affects the body
Autoantibodies can mark immune activity against thyroid tissue over time.
For athletes
Athletes with fatigue and autoimmune family history may see these on extended thyroid panels; treatment decisions stay clinical.
