The role of the thyroid gland is to regulate metabolism through the production of hormones such as thyroxine (T4) and triiodothyronine (T3). These hormones control the rate of energy expenditure, influencing how the body uses nutrients and oxygen. Proper thyroid function is essential for growth, development, and overall metabolic health. Disorders related to the thyroid, such as hypothyroidism or hyperthyroidism, can significantly impact various bodily functions, leading to various health issues.