Different Iodine Fortification of Salt in Various Countries
The daily iodine intake varies widely throughout the world. US iodized salt contains 46–77 ppm (parts per million), whereas in the UK the iodine content of iodized salt is recommended to be 10–22 ppm. Table salt in Italy is iodized at 30 ppm, which is typical of many European programs. Although iodine consumption is generally lower in Europe, the people in these countries do not usually develop thyroid disease. However, when people with past or present thyroid abnormalities are exposed to unaccustomed, large amounts of iodine (such as moving to North America and increasing their iodine intake), they can develop thyroid disease.