锌是人体内一种必需微量元素。缺锌可以引起体内一系列生理功能紊乱,代谢异常,儿童发育迟缓,智力低下等一些病理变化和疾病。据报导我国有一半以上的儿童有不同程度的缺锌。为此各种含锌的强化食品大量问世,改善了儿童的缺锌状态,促进了生长发育。但是,有人实验给刚断奶的猪食物中添加过量的锌可以引起生长抑制和食物摄入减少。此外,还可见关节炎、跛行和胃肠道炎症。从饮水中给小鼠锌(500 Zinc is an essential trace element in the human body. Zinc deficiency can cause a series of physiological disorders, metabolic disorders, childhood retardation, mental retardation and some other pathological changes and diseases. It is reported that more than half of children in our country have zinc deficiency to varying degrees. To this end a large number of fortified zinc-containing foods come out to improve the zinc deficiency in children, and promote the growth and development. However, it has been experimentally reported that the addition of excess zinc to swine weaned food causes growth inhibition and reduced food intake. In addition, arthritis, claudication and gastrointestinal inflammation are also seen. Zinc from mice in drinking water (500