Thyroglobulin Antibody

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About Our Thyroglobulin Antibody

The Thyroglobulin Antibody (TgAb) test measures antibodies that target thyroglobulin, a protein produced by the thyroid gland and essential for thyroid hormone production. When the immune system mistakenly attacks this protein, it can interfere with normal thyroid function and signal an underlying autoimmune thyroid disorder.

Elevated thyroglobulin antibodies are most commonly associated with autoimmune thyroid conditions such as Hashimoto’s thyroiditis and Graves’ disease. These disorders can cause a wide range of symptoms—including fatigue, weight changes, hair thinning, neck swelling, and heart rate changes—that often develop gradually and may be overlooked without testing.

This test also plays an important role in thyroid cancer monitoring. In individuals treated for differentiated thyroid cancer, thyroglobulin is used as a tumor marker. The presence of TgAb can interfere with thyroglobulin measurements, making antibody testing essential for accurate follow-up and detection of recurrence.

In addition, thyroid autoimmunity can impact fertility and pregnancy outcomes. Identifying thyroglobulin antibodies helps uncover immune-related thyroid dysfunction early, allowing for targeted treatment and better long-term thyroid health management.

What Is Included In This Test?

This test measures the level of thyroglobulin antibodies (TgAb) in your blood.

Your results can help:

Detect autoimmune thyroid disease
Support diagnosis of Hashimoto’s thyroiditis or Graves’ disease
Clarify abnormal thyroid hormone test results
Improve accuracy of thyroid cancer monitoring
Evaluate immune-related fertility or pregnancy concerns

TgAb testing is often interpreted alongside other thyroid function and antibody tests for a complete assessment.

Who Should Consider This Test?

This test is ideal for individuals with symptoms, conditions, or risk factors related to thyroid autoimmunity.

You should consider this test if you:

Have unexplained fatigue, weight changes, or hair thinning
Experience neck swelling or thyroid enlargement
Have abnormal TSH or thyroid hormone levels
Have a family history of autoimmune thyroid disease
Are being monitored after thyroid cancer treatment
Are experiencing infertility or pregnancy complications linked to thyroid health

Early detection supports accurate diagnosis and more effective thyroid management.

Convenient, No-Appointment Testing

To complete your test:

Order online through our website
Use the lab locator to find a nearby testing location
Walk in; no appointment required
Access your results securely in your HealthLabs.com account within one to three business days

110% Price Guarantee!

If you find the same test for a lower price from a comparable provider, contact us. We not only match the price, we beat it by an additional 10 percent of the difference.

Common Questions:

What does the Thyroglobulin Antibody (TgAb) test measure?

It measures antibodies that target thyroglobulin, a key protein involved in thyroid hormone production.

Is this test used to diagnose thyroid cancer?

It does not diagnose cancer, but it helps ensure accurate monitoring after thyroid cancer treatment.

Will anyone see my results besides me?

Your results are stored in your secure online account. They are not shared with anyone else. If you choose, you can print or download them to share with your own doctor.

Do I need to fast before this test?

Fasting is not required for this panel. You can eat and drink normally unless your doctor has given you other instructions.

Can I talk to someone about my results?

Yes. If your results come back abnormal or if you simply have questions, our team is here to support you. You can text our Patient Services team at 1800-579-3914.

Can I use insurance to pay for this test?

In order to ensure your privacy, we do not bill insurance directly, but you may use HSA or FSA funds. This keeps your results and testing completely private from insurers. We can also provide you with an itemized receipt for insurance reimbursement purposes if you need it.