Treated salt is a type of salt that has been processed to add additional minerals, such as iodine or potassium, to it. Ionized salt is salt that has been treated with an electric current to separate the ions and create a more pure form of salt. Iodized salt is salt that has been treated with iodine, which helps to prevent iodine deficiency in humans. Iodated salt is salt that has been treated with iodate, which is a compound of iodine and oxygen. All three types of treated salt are beneficial for human health, as they provide essential minerals that are not found in regular table salt.