碘是人体必需的微量元素,在体内主要参与甲状腺素合成,如碘缺乏,甲状腺素合成就会不足,而甲状腺素不但是机体生长过程中蛋白质的合成所必需的,也是机体发育过程所必需的。人体如缺少甲状腺素,不仅可引起人们熟知的地方性甲状腺肿和克汀病,而且可影响人的体力、智力发育,甚至可诱发甲状腺癌和心血管疾病。正常人体内含碘20～50毫克,相当于每 Iodine is an essential trace element in the human body and is mainly involved in the synthesis of thyroxine in the body, such as iodine deficiency, thyroid hormone synthesis will be inadequate, and thyroid hormone is not only necessary for the synthesis of the body during the growth of the protein, but also the body’s development process is necessary . Human body such as the lack of thyroxine, not only can cause well-known endemic goiter and cretinism, but also affect the physical, mental development, and even can induce thyroid cancer and cardiovascular disease. Normal human body iodine 20 ~ 50 mg, equivalent to each