Iodine is an Essential Mineral
The introduction of iodized salt was incredibly effective at eliminating the deficiency in many parts of the world. Prior to the 1920s, up to 70% of children in certain areas of the United States had goiters. In contrast, today 90% of the US population has access to iodized salt, and the population is considered overall iodine sufficient. Just a half teaspoon (3 grams) of iodized salt per day is enough to meet your daily iodine requirement
