Individual test · Labcorp 010314

Thyrotropin Receptor Antibody, Serum

This test measures the level of thyrotropin receptor antibodies, which are proteins made by the immune system that can interfere with how the thyroid gland functions. It is useful for determining if an overactive thyroid is caused by Graves' disease, an autoimmune condition, rather than other types of thyroid disorders. This distinction helps doctors understand the underlying cause of symptoms like rapid heartbeat, weight loss, or anxiety. However, this test only detects the presence of these specific antibodies and does not measure the actual amount of thyroid hormone in your blood.