Thyroglobulin antibodies (TgAb) target thyroglobulin, a protein used by the thyroid to store hormone.
- Normal range (adults)
- Up to 20 IU/mL
- Sample
- Blood
- Fasting
- Not usually needed
- Also called
- TgAb, Anti-Thyroglobulin, Thyroglobulin Ab, Anti-Tg
Anti-Thyroglobulin Antibodies normal range
| Group | IU/mLSame unit in all countries |
|---|---|
| Adults | Up to 20 |
Ranges vary slightly between laboratories. The range printed on your own report is the one to go by.
Why is the Anti-Thyroglobulin Antibodies test done?
They support a diagnosis of autoimmune thyroid disease and are checked during follow-up of thyroid cancer.
What does a high Anti-Thyroglobulin Antibodies level mean?
Positive TgAb point to autoimmune thyroid disease. After thyroid cancer treatment, they can affect how thyroglobulin results are read.
Common causes
- Hashimoto's thyroiditis
- Graves' disease
- Thyroid cancer follow-up
- Sometimes found in healthy people
Diet and lifestyle tips
- Avoid high-dose iodine supplements
- Keep a balanced diet with adequate selenium and vitamin D
When should you see a doctor?
Discuss positive results with your doctor, who will usually monitor TSH regularly.
Last updated
This page is for general education and is not a diagnosis. Normal ranges differ between laboratories, so always compare your result with the reference range printed on your own report, and discuss abnormal results with your doctor.