'Twin foified salt' contains:
National Institute of Nutrition (Hyderabad) developed 'Twin Foified Salt' also known as 'Double Foified Salt' (DFS) to prevent iron & iodine deficiencies. DFS - contains Iron and Iodine contains salt, Potassium Iodinate, Ferrous sulphate and sodium hexa metaphosphate. provides 40 mcg Iodine and 1 mg Iron per gram of salt.
Iodine + Fluorine
Iodine + Calcium
Iodine + Iron
Iodine + Chlorine
RDA, Nutritional Requirements