锌是细胞内含量最多的微量元素,与体内80多种酶活性有关。它通过促使蛋白质、核酸合成等作用对机体显示出明显的营养学效应。由于供应过少、吸收障碍、需要增加、流失排除过多等将造成机体绝对或相对缺锌。缺锌常表现出食欲减退、生长发育缓慢、组织修复困难、免疫功能下降、负氮平衡及疲乏等。对缺锌的判断主要是靠有引起缺锌可能的病史、典型的临床表现及血清锌水平的降低,一般认为后者更客观、灵敏、 Zinc is the most intracellular content of trace elements, and more than 80 kinds of enzyme activity in the body. It is through the promotion of protein, nucleic acid synthesis and other effects on the body showed a significant nutritional effect. As the supply is too small, barriers to absorption, the need to increase the loss of excess exclusion will cause the body absolute or relative lack of zinc. Zinc deficiency often shows loss of appetite, slow growth and development, tissue repair difficulties, decreased immune function, negative nitrogen balance and fatigue. The judgment of zinc deficiency mainly depends on the possible history of causing zinc deficiency, the typical clinical manifestations and serum zinc levels are reduced, the latter is generally considered more objective, sensitive,