锌的营养作用近年来,越来越引起了人们的重视。以往,人们总认为锌在自然界的分布是相当广泛的,造成锌缺乏的可能性是很小的。后来,有的学者发现猪角化不全症是由于锌缺乏引起的;而且肝硬化的患者有锌代谢的异常情况。以后,又有人报告了青少年存在缺锌的情况。通过这一系列事实,提醒人们注意到锌对人体的重要性。随即关于 In recent years, the nutrition of zinc has drawn more and more attention. In the past, people always think that the distribution of zinc in nature is quite extensive, causing the possibility of zinc deficiency is very small. Later, some scholars have found that pig deficiency syndrome is caused by zinc deficiency; and patients with liver cirrhosis have abnormal zinc metabolism. Later, another report on the existence of zinc deficiency in adolescents. Through this series of facts, people are reminded of the importance of zinc to the human body. Followed by