Hashimoto’s disease is a chronic lymphocytic thyroiditis. The disease belongs to the group of autoimmune diseases. The immune system considers the thyroid gland to be a foreign body that it intends to fight. The entire process begins to produce antibodies that attack the cells of this organ. A complementary test that is worth performing is the EHA – elemental hair analysis – which allows you to diagnose the level of, among others, iodine, zinc, and selenium, as well as other elements that are nutritional factors involved in both the proper functioning of the thyroid gland and in the pathogenesis of thyroid gland diseases.