Dietary iodine intake is obligatory for the production of thyroid hormones. Despite substantial public health advances over the past 3 decades, iodine deficiency currently affects 1.92 billion people globally.1 Dietary iodine requirements are increased during pregnancy due to increased thyroid hormone production, increased renal iodine losses, and fetal iodine requirements.2 Dietary requirements remain increased in lactation due to the concentration of iodine in breast milk.
Stagnaro-Green A, Sullivan S, Pearce EN. Iodine Supplementation During Pregnancy and Lactation. JAMA. 2012;308(23):2463–2464. doi:10.1001/jama.2012.45423