[header] How to study the functions of the thyroid hormone in humans [title] Learn about the structure of the thyroid hormone. [step] Thyroid hormone is a derivative of the amino acid tyrosine. It has iodine atoms attached to it. 
Therefore, its biosynthesis requires iodide ions that must be supplied in the diet in the form of tablets. Otherwise goiter can result in individuals that are deprived of iodine in their diet.