Thyroid Antibodies Blood Test

Name: Thyroid Antibodies Blood Test
Brand: Bloody Good
Price: 86.0 AUD
Availability: InStock

$86.00 AUD

Had a fluctuating TSH or thyroid symptoms your GP thinks might be autoimmune, and want to check whether thyroid antibodies are behind it?

Measures TPO and thyroglobulin antibodies to assess whether the immune system is attacking the thyroid. Elevated antibodies are associated with autoimmune thyroid conditions including Hashimoto's thyroiditis and Graves' disease.

You will be emailed a referral to take to your local collection centre. If you ever have any questions, we're here to help.

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Private health tests

How It Works

Getting your health measured shouldn't be hard! We're here to help you every step of the way.

Order a test

Order the private test that suits you and your goals. After ordering, you will receive your referral by email.

Collect the sample

Attend one of our 4000+ partner collection centres throughout Australia. Search locations.

Receive your results

View all your lab results in your secure health dashboard. Easy!

Overview

Thyroid antibodies are immune proteins that mistakenly target components of the thyroid gland. Their presence is one of the key indicators of autoimmune thyroid disease, the most common cause of both underactive and overactive thyroid conditions in Australia.

This test measures two specific antibodies: thyroid peroxidase antibodies (TPO) and thyroglobulin antibodies (TgAb). TPO antibodies target an enzyme involved in thyroid hormone production and are strongly associated with Hashimoto's thyroiditis, the leading cause of hypothyroidism. TgAb target a protein the thyroid uses during hormone synthesis and can be elevated in both Hashimoto's and Graves' disease.

An important point to understand is that elevated antibodies do not automatically mean you have thyroid disease. Many people carry antibodies for years without any change to their thyroid function. What antibodies indicate is that the immune system has begun targeting the thyroid, which increases the likelihood of thyroid dysfunction developing over time.

Testing is most useful when thyroid function results are borderline, when symptoms suggest autoimmune involvement despite normal TSH levels, or when there is a family history of autoimmune conditions. It can also clarify the underlying cause when thyroid dysfunction has already been confirmed.

Your GP or endocrinologist will interpret antibody results alongside a thyroid function panel (TSH, Free T3, Free T4) to build a full picture. A positive antibody result on its own warrants monitoring rather than immediate treatment in most cases.

Symptoms

This test checks whether your immune system is producing antibodies that target your thyroid. It's used when autoimmune thyroid disease is suspected — particularly when thyroid function results are borderline, or when symptoms suggest autoimmune activity despite normal TSH levels.

Questions

TPO (thyroid peroxidase) antibodies target an enzyme involved in thyroid hormone production and are most strongly associated with Hashimoto's. TgAb (thyroglobulin) antibodies target a protein the thyroid produces and are elevated in both Hashimoto's and Graves' disease.
Yes. Elevated antibodies often appear years before thyroid function is affected. Your hormone levels may still be within range while antibodies are present.
It's worth considering. Thyroid antibody results are most useful when reviewed alongside a full thyroid function panel. You can add the Thyroid Function Test to your order.
Elevated TPO antibodies are a strong indicator, but a diagnosis involves your symptoms, clinical history, and sometimes ultrasound. Your GP or endocrinologist will make the call.
Not exactly. TgAb is used in thyroid cancer monitoring because it can interfere with thyroglobulin testing post-treatment. TPO antibodies relate to autoimmune disease. Your practitioner will clarify which is relevant to your situation.

Dr. Vu Tran
Bloody Good’s Chief Medical Officer

How to prepare

No fasting required. You can eat and drink as normal before your blood draw. No specific medication changes are needed prior to testing, but check with your practitioner if you're unsure.

After the test

Take your results to your GP or endocrinologist. If antibodies are elevated, they'll discuss whether further investigation or ongoing monitoring is appropriate. If you haven't already done a thyroid function test (TSH, Free T3, Free T4), consider adding one.

Your test results will be available in your private dashboard. If there are any urgent issues, we'll let you know so you can follow up with your health professional.

Understanding results

- Elevated TPO antibodies are the hallmark of Hashimoto's thyroiditis and are also seen in Graves' disease.
- Elevated TgAb can be present in both conditions and is also monitored in people treated for thyroid cancer.
- Some people carry elevated antibodies for years before thyroid function changes. A positive result on its own doesn't confirm disease — your practitioner will interpret it alongside your symptoms and thyroid hormone levels.

Testimonials

What Our Customers Say

4.9

Average Rating

5,500+ Customers Tested

250,000+ Individual Biomarkers

Adam O. ACT

Simple health checks in my control

I didn't know that private blood tests were an option. Tried this platform as the packages suited what I wanted for a good price. Easy to follow instructions, and super quick results. Platform provides more information than my gp's ever have on the tests and what the results meant. Would like more clinics to be able to test at (specifically Capital Pathology) but there is a decent network. Will continue to use.

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Wayne S. NSW

Bloody Good

This is a great service, very helpful support, cheaper than going to the doctor for a blood test

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Quick access to blood tests

BLOODY GOOD is a very efficient route to access blood testing for a visitor outside the Australian health system. It is quick with the necessary referral and documentation, and quick with results. Thank you

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Cameron Smith Head of Ecommerce, Brisbane

Frequently Asked Questions

Do I need to book ahead?

Most collection centres accept walk-ins. Some may require a booking - check details when you click on your chosen location.

How do I know if I need to fast?

If your test needs fasting, we’ll include that in your instructions after you order. Fasting usually means no food for 8–12 hours, but water is fine.

What do I need to bring?

Just your pathology referral form (we email it to you)

Can I bring someone with me?

Of course. Just maybe don’t bring the friend who faints at the sight of blood.

What’s a phlebotomist?

They’re the highly trained professionals who take your blood sample - with a steady hand and a sharp needle. They love blood, but don’t worry… they’re not vampires. Just legends who make blood tests quick, clean, and (almost) painless.

What other samples may I need to provide for my test?

Some of our tests include Urine, Stool, Saliva and more. Each test will have a clear description on what sample you will need to give and instructions on how.