Salt additive is a term used to describe substances that are added to salt in order to enhance its flavor or nutritional value. The two most common salt additives are INE and IODINE. INE is a three-letter abbreviation for an organic compound called inosine, which is a nucleoside found in many foods and is used to improve the taste of salt. Iodine is a six-letter abbreviation for an essential mineral that is added to salt to prevent iodine deficiency. Iodine is important for proper thyroid function and overall health.