Iodized salt refers to sodium chloride (NaCl) containing potassium iodate (KIO3). The World Health Organization recommends 6 grams of salt per person per day, but China people generally exceed 20 grams. Iodine-free salt must be provided for people to choose at the same time, otherwise there is a great risk of excessive iodine intake.

Iodized salt refers to salt containing potassium iodate and sodium chloride. Because most areas of our country are short of iodine, iodine deficiency will cause iodine deficiency disease, so the state forces a small amount of iodized salt to be added to edible sodium chloride salt.

Two-thirds of iodine in the body exists in the thyroid gland, which can control metabolism and is influenced by iodine. Therefore, if iodine is insufficient, it may cause mental retardation, obesity and lack of vitality. China scholars have reported that goiter has a long history, and China is one of the first countries in the world to treat this disease with seaweed. Iodine was put forward by courtois in 18 1 1 year. Most of the iodine in the diet is converted into iodide in the gastrointestinal tract, which is almost completely absorbed by the body after entering the blood and distributed in the extracellular fluid of the whole body. The kidney is the excretory organ of iodine. Although the amount of iodine ingested by human body is very small, the kidney has no function of retaining iodine. A small amount of iodine is also excreted through feces. On May 15 every year, the National Day for Prevention and Treatment of Iodine Deficiency Disorders (IDD) publicizes that edible iodized salt can effectively prevent IDD.