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锌是人体不可缺少的微量元素。当人体血锌含量下降到每100毫升75微克以下时,就会出现缺锌症状。造成缺锌的原因大致可分为三种:(1)供应量不足,这是最常见的缺锌原因,例如长期素食、饮食搭配不合理等。(2)需求量增加,例如在快速生长期的孩子。(3)吸收障碍,例如患有肠道慢性炎症,患有肠寄生虫病,进行过胃肠手术等。由于锌参与人体多种必须酶的合成、催化、调节作用,所以一旦缺乏时,常会出现食欲不振,异食癖,口腔黏膜反复溃疡,生长发育迟缓,皮炎及因抵抗力低下导致的多种传染性疾病。由于缺锌时表现出的症状和体征是一组同时发生在多系统、多器官的异常现象,所以叫缺锌综合征。虽然从60年代起人们对补锌就比较重视,但时至今日,家长们在判断孩子是否缺锌以及给孩子补锌的问题上仍然存在很多误解。一、认为只有婴幼儿才会缺锌一般认为,母乳中含锌量较多,又容易吸收,所以母乳喂养的孩子不会缺锌。实际上也不一定。如果乳母的食物中长期缺乏锌元素,其乳汁中也会缺锌,所以吃母乳的孩子有时也会缺锌。而牛乳中含锌量少且吸收率较低,所以牛奶
Zinc is an indispensable trace element in human body. When the human serum zinc levels dropped to 75 micrograms per 100 ml below, there will be zinc deficiency symptoms. The causes of zinc deficiency can be roughly divided into three types: (1) lack of supply, which is the most common cause of zinc deficiency, such as long-term vegetarian diet with unreasonable. (2) increased demand, for example, in fast-growing children. (3) Absorption disorders such as chronic gut inflammation, intestinal parasites, gastrointestinal surgery, etc. As zinc participates in the synthesis, catalysis and regulation of many kinds of essential enzymes in the human body, in the absence of zinc, there often appear loss of appetite, pica, ulcer of oral mucosa, growth retardation, dermatitis and various infections due to low immunity Sexually transmitted diseases. As zinc deficiency symptoms and signs are a group of simultaneous occurrence of multiple systems, multiple organ abnormalities, it is called Zinc deficiency syndrome. Although people pay more attention to zinc supplementation since the 1960s, parents still have many misunderstandings about whether children lack zinc or supplement zinc to their children. First, that only infants and young children will be zinc deficiency Generally believed that more zinc in breast milk, but also easy to absorb, so breastfeeding children will not lack zinc. In fact, not necessarily. If the milk of the food in the long-term lack of zinc, the milk will also be zinc deficiency, so children sometimes breast milk zinc deficiency. The milk contains less zinc and low absorption rate, so milk