The purpose of this study was to investigate the iodine nutrition and the epidemiologic state of hyperthyroidism in ChongQing after universal salt iodization(USI) .

• 本研究通过一个轻度缺碘的内陆城市重庆，在食用碘盐后不同人群的碘营养状况及甲亢发病情况的变化，探讨碘盐的安全剂量。