Iodination is a chemical process that involves the incorporation of iodine into organic compounds. This process is crucial in various biological and industrial contexts. In toxicology, understanding iodination is vital because iodine plays a critical role in the synthesis of thyroid hormones, which are essential for metabolism and growth. The thyroid gland uses iodide absorbed from the bloodstream to produce hormones like thyroxine (T4) and triiodothyronine (T3).