The Beijing Municipal Health Bureau issued a reminder on May 15, recommending that pregnant women use salt specially designed for pregnant women, arousing widespread concern among expectant mothers. In 2011, my country released the national food safety standard \”Iodine Content of Edible Salt\”. The new standards stipulate that various localities can supply iodized salt with one, two, or three iodine contents based on the iodine nutritional level of the province\’s population. After the iodine standard for edible salt was lowered, Guangdong and other places added iodized salt specifically for pregnant women in response to the special needs of pregnant women for iodine. According to surveys, the incidence of thyroid disease in pregnant women caused by iodine deficiency accounts for 10%. Iodine deficiency in pregnant women