Quick highlights
- Key autoimmune thyroid marker used with TSH and thyroid hormones
- Supports evaluation of Hashimoto-type autoimmune patterns (clinician interpreted)
- Useful in pregnancy planning/monitoring when ordered
- Does not directly measure thyroid function—needs TSH/Free T4 context
- No fasting; simple serum blood test
- Biotin supplements can interfere with some assays—disclose use
- Supports monitoring when clinically indicated
- Positive result may occur before hormone changes—clinician guidance matters
- Home blood collection available in many service areas
- SEO coverage: anti TPO test, thyroid antibody test, autoimmune thyroid test
What’s included
Preparation
- Book blood draw (home or lab)
- No fasting required unless other tests require fasting
- Disclose thyroid medicines and supplements (especially biotin)
- If taking high-dose biotin, ask clinician about pausing 24–48 hours before test
- Bring prior thyroid reports (TSH/FT4) if available
- Collect serum blood sample via trained phlebotomist
- Download report from <a href='/my-account/'>View reports</a>
- Review results with clinician for interpretation and next steps
FAQs
A blood test that measures thyroid peroxidase antibodies, used to support evaluation of autoimmune thyroid patterns.
No.
Not necessarily. Antibodies suggest autoimmune involvement, but thyroid function depends on TSH and hormone levels.
Yes, some individuals may have antibodies without symptoms; clinicians interpret results with context.
TSH, Free T4, sometimes Free T3, TgAb, and ultrasound depending on symptoms.
High-dose biotin can interfere with some immunoassays; ask your clinician whether to pause it before testing.
Antibody levels can change over time; clinicians focus on thyroid function tests for dosing decisions.
It may be used in pregnancy planning or monitoring in some cases; your clinician will advise.
Often same day or within 24 hours.
Serum blood sample.
Yes in many service areas.
Do not stop medicines unless your clinician instructs.
Sometimes, but treatment decisions are usually guided by TSH/Free T4 rather than antibody level alone.
Download from <a href='/my-account/'>View reports</a>.
Notes
Autoimmune markers require correlation with thyroid function and symptoms.
