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微量元素是指人体内含量低于0.01%的元素,而这些元素又是人体代谢和生命活动所必需的。微量元素在人体内有几十种,其中锌是最重要的微量元素之一。现将锌在胎儿及婴幼儿生长发育中的作用阐述如下:正常成人体内含锌给2～2.5g,存在于人体各组织器官内,含量最多的是肌肉,约占60%,其次是骨骼,约占30%,皮肤、毛发、性腺、脑垂体和肝脏含锌量也相对较多。足月小儿体内含锌约60mg,其中1/3贮于骨骼,1/4贮于肝脏。正常人每日需锌量与年龄有关,初生6个月为3mg,7～11个月5mg,1～10岁
Trace elements refers to the human body content of less than 0.01% of the elements, which are essential elements of human metabolism and life activities. There are dozens of trace elements in the human body, of which zinc is one of the most important trace elements. Now the role of zinc in fetal and infant growth and development are described below: Normal adult zinc to 2 ~ 2.5g, exist in various tissues and organs of the human body, the largest content is muscle, accounting for about 60%, followed by bone, About 30%, skin, hair, gonads, pituitary and liver zinc content is relatively large. Full-term children body zinc contains about 60mg, of which 1/3 stored in the bones, 1/4 stored in the liver. Normal daily amount of zinc needed and age-related, 6mg for the first three months, 7 to 11 months 5mg, 1 to 10 years old