微量元素是指在人体中含量小于万分之一的元素。至今已经发现人体内有五十多种微量元素,它们的总重量还占不到体重的千分之二。随着科学技术的发展,已逐渐证实越来越多的微量元素,从各方面对人的生命及健康起着巨大的作用。在五十多种微量元素中,有的是人体所必需的。 Trace elements in the human body is less than one ten thousandth of the elements. So far it has been found that there are more than fifty kinds of trace elements in the human body, and their total weight still accounts for less than 2% of body weight. With the development of science and technology, it has been gradually confirmed that more and more trace elements play a huge role in human life and health in all aspects. Among the more than fifty kinds of trace elements, some are necessary for the human body.