Paine-Wilson and Chen (1979) reported that pure folic acid solution was stable for up to 10 h heating at 100C (pH 4–12). Unlike most of the foods where folates are bound to the macromolecules forming a complex food matrix, added folic acid in fortified foods is expected to be bound only physically to the food system. It may not warrant harsher heat treatment such as 121C, to extract folate where chances of vitamin losses are high