锌是人体必须的微量元素之一 ,和人体的健康息息相关。锌对人体免疫系统和抗氧化系统功能的维持 ,三大营养物质代谢、DNA复制和核酸合成的调节具有重要作用。锌缺乏会引起儿童生长发育迟缓 ,感染性疾病的发病率增高和智力发育水平低下。代谢和遗传性功能障碍或者锌摄入和吸收不足都会引起锌缺乏。虽然新生儿、儿童、怀孕妇女和老年人是锌缺乏的高危人群 ,但锌缺乏已经威胁到整个人类 ,在发达和发展中国家都比较流行 ,是一个世界范围的营养问题 Zinc is one of the essential trace elements of the human body and is closely related to the health of the human body. Zinc plays an important role in the maintenance of human immune system and antioxidant system, and in the regulation of three major nutrient metabolism, DNA replication and nucleic acid synthesis. Zinc deficiency can cause growth retardation in children, increased incidence of infectious diseases and mental retardation. Metabolic and genetic dysfunction or zinc intake and inadequate absorption can cause zinc deficiency. Although newborns, children, pregnant women and the elderly are at-risk of zinc deficiency, zinc deficiency has posed a threat to the entire human population and is prevalent in both developed and developing countries as a worldwide nutrition problem