锌是人体必需元素之一,虽然在人体中含量很少,但其功用非常重要,目前已发现的含锌的酶或含锌蛋白有200多种,锌参与了人体内蛋白质、脂肪、糖、核酸的合成与代谢,对于生命具有极为重要的意义。婴幼儿缺锌将会影响到蛋白质、脂肪、糖、核酸等物质的正常新陈代谢过程,造成生长发育迟缓,而且还会影响到各种生理功能。婴幼儿缺锌最常见的症状是厌食、异食癖和生长停滞。若在胎儿和乳儿期缺锌,还会造成智力发育障碍,严重的还会发生先天性神经管畸形。一生中按单位体重锌需要最多的时期是生长最快阶段,也就是婴幼儿期、学龄儿童期和青春期,而婴幼儿时期又尤为重要。在这些时期一旦缺锌,很多器官和组织的正常生理功能将会受到影响,生长发育迟缓,智力发育和免疫功能等受到干扰,还容易发生粘膜增生和角化不全,妨碍食物与舌乳头中的味蕾接触,使味觉 Zinc is one of the essential elements of the human body, although its content in human body is very little, its function is very important. So far, more than 200 kinds of zinc-containing enzymes or zinc-containing proteins have been found. Zinc participates in the body’s protein, fat, Nucleic acid synthesis and metabolism, for life is extremely important. Zinc deficiency in infants and young children will affect the normal metabolism of protein, fat, sugar, nucleic acids and other substances, causing growth retardation, but also affect a variety of physiological functions. The most common symptoms of zinc deficiency in infants and young children are anorexia, pica and growth arrest. If the lack of zinc in the fetus and infancy, but also cause mental retardation, severe congenital neural tube defects can occur. Zinc per unit of body weight during life is the fastest growing phase of the period, that is, infancy, school-age children and adolescence, and infants and young children is particularly important. Once zinc deficiency in these periods, the normal physiological function of many organs and tissues will be affected, growth retardation, mental development and immune function are disturbed, and mucosal hyperplasia and keratosis are also prone to occur, hampering food and tongue nipples Taste bud contact, so taste