✧ The main objective of this study is to assess the impact of double-fortified salt containing iron and iodine on the work performance (productivity) of girls plantation workers in India. ✧ Efficacy studies have shown that salt double-fortified with iodine and iron can significantly reduce the incidence rates of iron-deficiency anemia (IDA) and iodine-deficiency disorders. ✧ Double-fortified salt (DFS) is often prepared by mixing microencapsulated iron compounds into conventionally iodate salt.