Iodides are chemical compounds that contain iodine in the form of an anion, specifically the iodide ion (I⁻). They are commonly found in various salts, such as sodium iodide (NaI) and potassium iodide (KI). Iodides play an essential role in human health, particularly in the production of thyroid hormones, which regulate metabolism. In nature, iodides can be found in seawater and certain minerals. They are also used in medical applications, such as in radiology for imaging and as a dietary supplement to prevent iodine deficiency. Additionally, iodides have applications in photography and as disinfectants.