Iodine deficiency, pregnancy, and autoimmunity

Iodine deficiency is still a serious concern, especially for pregnant women in North America, as reported in a review just published in the journal Thyroid. Despite global improvements since 1990, iodine sufficiency has actually been declining in US adults. Iodine deficiency can be detected with a 24-hour urine collection. Even when supplementation is indicated it must be done cautiously to avoid triggering autoimmune thyroiditis.