<unk>  accounts for 65% of the molecular weight of T4 and 59% of T3. There is a total of 15–20 mg of<unk>  in the human body, primarily concentrated in thyroid tissue and hormones. Thirty percent of<unk>  is distributed in other tissues, including the mammary glands, eyes, gastric mucosa, choroid plexus, arterial walls, the cervix, and salivary glands. In the cells of these tissues,<unk>  enters directly by sodium-iodide symporter (NIS). * *
Iodine deficiency
Growth hormone deficiency
Thyroid dyshormonogenesis
Isolated growth hormone deficiency
Congenital hypothyroidism
Constitutional growth delay
Adrenocorticotropic hormone deficiency
Congenital iodine deficiency syndrome