This test is used to evaluate the level of antidiuretic hormone (ADH) in the blood. This test aids in the diagnosis of excess or deficiency of ADH hormone that can be used to determine the level of sodium in the blood. This test is also recommended for the evaluation of type of diabetes mellitus (nephrogenic diabetes insipidus and central diabetes insipidus). Syndrome of inappropriate antidiuretic hormone secretion (SIADH) is also diagnosed through this test and is caused by increased production of antidiuretic hormone from the posterior pituitary gland. This lead to increase in body fluids and body edema.
LabEspy recommends Personalabs, True Health Labs for this test.