Thyroid Antibodies
Blood tests that check for antibodies that affect the thyroid.
Thyroid Antibodies
Blood tests that check for antibodies that affect the thyroid.
Also known as
- Anti-TPO
- Anti-thyroglobulin
What it measures
- Thyroid peroxidase antibodies (TPOAb)
- Thyroglobulin antibodies (TgAb)
Why a doctor may order it
Usually ordered when thyroid hormone tests show the thyroid isn't working properly, to see whether an autoimmune condition could be the cause.
What it helps evaluate
It can help a doctor look into whether an autoimmune thyroid disease is behind a thyroid problem.
Preparation
There are no special preparations for a thyroid antibodies test.
Fasting
No fasting is needed.
Important considerations
- A result needs your doctor's interpretation — it doesn't by itself tell you whether treatment is needed.
Discuss results with your doctor
Talk to a doctor about your symptoms and about what your results mean — a single result is not a diagnosis. See a doctor promptly for severe or worsening symptoms.