
By Dr. Mercola Iodine is essential to your health. Unfortunately, data collected by the U.S. National Health and Nutrition Examination Survey has revealed a significant drop in median urine iodine values.1 The median iodine level measured in urine samples was 320 micrograms per liter (mcg/L) between 1971 and 1974. By 1988, it dropped to 145 mcg/L. Surveys taken in the years






