Patients with hyperthyroidism generally have more iodine in their bodies rather than a deficiency, but it depends on the cause of the hyperthyroidism. Patients with Graves’ disease, which is one of the most common causes of hyperthyroidism, accounting for about 80% of cases, as well as toxic nodular goiter and hyperthyroidism caused by iodine-containing medications, have more iodine in their bodies rather than a deficiency. Hyperfunctional adenomas and pituitary disorders are not related to iodine content, but to the underlying disease. For example, hyperfunctional adenomas are caused by the patient’s thyroid hormone secretion, while pituitary hyperthyroidism is caused by the patient’s pituitary disorder.