Recommended daily allowances for iodine intake are 150 mcg for non-pregnant adults. During pregnancy and lactation, higher iodine intakes of 220-250 mcg in pregnant women and 250-290 mcg in breastfeeding women in the U.S are encouraged. ATA recommends that women take multivitamins containing 150 mcg iodine daily in the form of potassium iodide (KI) during preconception, pregnancy, and lactation to meet these needs. “For other individuals, the U.S. diet generally contains enough iodine to meet nutritional needs, with common sources being iodized salt, dairy products, breads, and seafood.” says Angela Leung, MD, Chair of the ATA Public Health Committee and Assistant Professor of Medicine at Boston University School of Medicine. There are only a limited number of medical conditions in which the short-term use of high amounts of iodine is indicated.

The public is advised that many iodine, potassium iodide, and kelp supplements contain iodine in amounts that are up to several thousand times higher than the daily Tolerable Upper Limits for iodine. There is no known thyroid benefit of routine daily iodine doses in excess of the U.S. recommended daily allowance.

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