The Anti-Endomysium IgM test is used to evaluate the presence of antibodies that indicate celiac disease, an immune disorder in which the body reacts abnormally to gluten. This test is useful in diagnosing the disease, especially in cases where IgA results may not appear. A blood sample is taken to analyze the levels of these antibodies, helping doctors assess intestinal health and determine the extent of gluten’s impact on the patient.