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碘是影响人类健康的重要的必需微量元素之一。碘进入机体后，迅速为甲状腺摄取，并合成甲状腺激素，同时碘对甲状腺激素的水平又起着反馈调节作用［１］。甲状腺激素对维持基础代谢、生长发育尤其是中枢神经系统的发育有重要作用。碘缺乏会造成甲状腺激素合成不足而影响脑的正
Iodine is one of the important essential trace elements that affect human health. Iodine into the body, the rapid uptake of the thyroid gland, and the synthesis of thyroid hormones, while the level of thyroid hormone on iodine also play a role in feedback regulation [1]. Thyroid hormones to maintain basic metabolism, growth and development, especially the development of the central nervous system has an important role. Iodine deficiency can cause lack of thyroid hormone synthesis and affect the brain is positive