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Anti-TSH Receptor Antibodies (TRAb) Test
Experiencing heart palpitations or weight loss? The TRAb test identifies antibodies stimulating the thyroid, helping diagnose Graves' disease and the underlying cause of hyperthyroidism for a targeted treatment plan.

The thyroid-stimulating hormone receptor (TRAb) antibody test is a quantitative immunoassay that detects and measures autoantibodies directed against TSH receptors on the surface of thyroid cells. These antibodies (especially the TSI type) mimic TSH, binding to and continuously activating the receptors, leading to overproduction and secretion of thyroid hormones (T3 and T4) and pituitary atrophy (low TSH). It is the most specific test for diagnosing Graves' disease.
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