👉 Thyroid hormone (TH) is a protein that is produced by the thyroid gland and plays a crucial role in regulating the metabolism of the body. It contains two main components, thyroxine (T4) and triiodothyronine (T3). T4 is responsible for producing thyroid hormones and T3 is the precursor to T4. In the human body, the production of thyroprotein involves several enzymes. The key enzyme in this process is thyrotropin-releasing
