According to research, the normal adult physiological requirement for iodine is 75 micrograms per person per day. Nutritionists believe that the dietary supply of iodine should be more than the physiological requirement and that the appropriate supply is 150 micrograms per person per day. The World Health Organization (WHO) recommends an appropriate supply of 90 micrograms per person per day for preschool children aged 0-6 years, 120 micrograms for school-age children aged 6-12 years, 150 micrograms for people aged 12 years and older, and 250 micrograms for pregnant and lactating women; the recommended intake is 150-300 micrograms per person per day. 300 micrograms per person per day, with an upper intake limit of 1000 micrograms per person per day.