Anti Thyroglobulin Antibodies (ATG) Test
- Category
- Thyroid
- Sample
- Blood sample taken from a vein in your arm
- Reports () Terms & Conditions Report time varies with time of sample collection.
- In 2 days
- Fasting
- No Fasting
- Age
- 5+ Years
What Is This Test?
Detects antibodies against thyroglobulin, a protein made by the thyroid gland.
Why this test is performed?
Supports a diagnosis of autoimmune thyroid disease and is checked in thyroid cancer follow-up, because these antibodies can interfere with thyroglobulin measurement.
Who should take this test?
Tiredness, weight gain or loss, hair fall, feeling cold or hot, irregular periods, anxiety/palpitations, infertility or pregnancy planning.
Test Preparation
No fasting needed.
Medical disclaimer · for information only, not medical advice
This article is for general information and education only. It is not medical advice, does not create a doctor–patient relationship, and is not a substitute for consultation with a qualified doctor who has assessed your individual situation. Never delay seeking medical advice because of something you have read here.
In a medical emergency, call 112, or 108 for an ambulance where that service operates, or go to your nearest emergency department. If you are in mental health distress, Tele-MANAS is free and available 24×7 on 14416.
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Frequently asked questions
Anti-TPO is more commonly positive in autoimmune thyroiditis; anti-TG adds information in some cases.
No fasting is needed. You can eat and drink normally unless your doctor has advised otherwise.
Blood sample taken from a vein in your arm.
Usually within 15–39 hours after the sample reaches the lab. You will receive the report online.
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