Iodine is necessary for the production of which hormones?

Iodine is an essential component in the synthesis of thyroid hormones, specifically triiodothyronine (T3) and thyroxine (T4). The thyroid gland utilizes iodine to produce these hormones, which play a critical role in regulating metabolism, growth, and development in the body.

The presence of iodine allows the thyroid to attach to a specific number of iodine atoms, necessary for forming T3 and T4 appropriately. A deficiency in iodine can lead to thyroid-related disorders, such as goiter or hypothyroidism, emphasizing the importance of adequate iodine intake for proper hormonal function.

In contrast, insulin is produced by the pancreas, cortisol is a steroid hormone produced by the adrenal glands, and prolactin is secreted by the pituitary gland. These hormones do not rely on iodine for their production; therefore, they are not relevant to the question regarding iodine's necessity.