Thyroid hormones are a group of hormones produced by the thyroid gland, a small butterfly-shaped gland located in the neck. The two main thyroid hormones are thyroxine (T4) and triiodothyronine (T3), which play a crucial role in regulating the body’s metabolism, growth, and development. They help to control the rate at which the body uses energy, the production of proteins, and the sensitivity of the body to other hormones. Imbalances in thyroid hormone levels can lead to a range of health problems, including hyperthyroidism (an overactive thyroid) or hypothyroidism (an underactive thyroid). Treatment for thyroid hormone imbalances may involve medication or, in some cases, surgery.