Thyroid
What is TRAb?
marker for Graves' disease
- Unit
- IE/L
- Sample
- Serum
- Fasting
- No fasting needed
- Turnaround
- 5 days
TRAb are antibodies that stimulate the thyroid to overproduce hormones. It is the specific marker for Graves' disease - the most common cause of hyperthyroidism.
The test is used when low TSH and raised thyroid hormones are confirmed, to determine the cause.
What does low TRAb mean?
Negative TRAb makes Graves' disease less likely.
What does high TRAb mean?
Positive TRAb strongly suggests Graves' disease.
Panels that measure TRAb
- Thyroid Test Complete
More markers in the same area
Launching in Stockholm in 2026.
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This is general information about the marker, not an assessment of your values and not medical advice. Last updated: August 2026.