Thyroglobulin Antibody
Thyroglobulin antibodies (anti-Tg) are immune proteins that target thyroglobulin, a protein made by the thyroid gland. This test helps detect autoimmune thyroid disorders.
Category: Thyroid Panel
Also known as: thyroglobulin antibody, anti-thyroglobulin, tg antibody, anti-tg, thyroglobulin ab, anti tg, tgab, anti-thyroglobulin antibody
Reference range: 0–4 IU/mL (Source: ABIM)
Standard unit: IU/mL
High values may indicate
High thyroglobulin antibodies may indicate Hashimoto's thyroiditis, Graves' disease, or other autoimmune thyroid conditions. They can also interfere with thyroglobulin tumor marker tests.
Low values may indicate
Low or absent thyroglobulin antibodies are normal and suggest no autoimmune activity targeting thyroglobulin.
Frequently asked questions
- What is a normal Thyroglobulin Antibody level?
- A typical reference range for Thyroglobulin Antibody is 0–4 IU/mL (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is Thyroglobulin Antibody measured in?
- Thyroglobulin Antibody is most commonly reported in IU/mL. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do Thyroglobulin Antibody reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track Thyroglobulin Antibody over time?
- Yes. Upload results from any lab and BloodId charts your Thyroglobulin Antibody over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: MedlinePlus, U.S. National Library of Medicine
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