ABSTRACT
The current prevention and control strategy of iodine deficiency disorders in China is "adjust measures to local conditions, guide by classification and supplement iodine scientifically". The ultimate goal of the implementation of this prevention and control strategy is to carry out "precise iodine supplementation". However, at present, the implementation of "precise iodine supplementation" faces some difficulties, mainly how to accurately measure individual iodine nutrition. This paper discusses the current framework of iodine nutrition indicators, the advantages and disadvantages of various indicators, the gold standard for measuring the indicators, and the application scope and joint application of each indicator from three aspects: the intake of iodine, the level of iodine and the excretion of iodine.