Thyroid
Anti-Thyroglobulin
LOINC 8098-6 · IU/mL
What it is
Anti-thyroglobulin antibodies are immune proteins that target thyroglobulin, a protein the thyroid uses to make its hormones.
Why it matters
Their presence helps identify autoimmune thyroid conditions such as Hashimoto's thyroiditis.
What high values can mean
A higher value suggests the immune system is reacting against the thyroid, common in autoimmune thyroid disease.
What low values can mean
A lower or negative value means little or no such antibody is detected.
How to improve it
Antibody levels are not changed by lifestyle; care focuses on thyroid function and any symptoms.
Food & lifestyle
No diet removes these antibodies; supporting overall thyroid health and following your clinician's plan is the aim.
Preparing for the test
A blood test; fasting is not required — follow your lab's instructions.
When to talk to a doctor
Discuss positive thyroid antibodies with a doctor, who interprets them with TSH and thyroid hormones.
Related markers
Sources
- MedlinePlus (NIH)
- Testing.com (AACC)
Content reviewed on June 26, 2026
Medical disclaimer
This content is for educational purposes only. It is not medical advice and does not diagnose, treat, or prevent any condition. Reference ranges vary between laboratories — always use the range printed on your report and discuss your results with a healthcare professional.
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