Introduction to universal iodine supplementation

In 1994, universal consumption of iodized salt was mandated as a national policy in China, similar to the family planning policy. At that time, the country promulgated the "Regulations on the Management of Salt Iodization to Eliminate the Hazards of Iodine Deficiency". Under the slogan "Eat iodized salt, the whole family will be healthy!", the complex situation of iodine nutrition in various places has been seriously underestimated. Across the country, especially in coastal areas, the salt iodization policy has been increasingly questioned.