Iodized salt contains sodium and chloride, which makes the salt; and it contains iodine. This mineral, has been added to salt to help the population get iodine. Iodine helps prevent certain types of brain disorders, mental retardation, miscarriages and goiter. These iodine-related disorders have virtually disappeared in places that have iodized salt. Presently, there are 740 million people a year who suffer from iodine deficiency. One simple act of adding iodine to the salt would help get rid of this disorder. So the benefits -- is to help maintain a healthy population.
so you do not get goiter it has to do with thyroid i think, the iodine helps something