自1957年美国学者施瓦兹等通过动物实验确认Se(硒)是动物必需的微量元素之后,人们相继发现,Se与人的心血管疾病、癌症等都有关系。近年来我国学者在探讨地方病病因研究中认为环境中缺和克山病、大骨节病关系密切。Se与有机物、酶系统,特别和其它微量元素的相互作用, Since the American scholar Schwartz in 1957 and other animal experiments confirmed that Se (selenium) is an essential trace element for animals, people have been found, Se and cardiovascular disease, cancer and so on. In recent years, scholars in our country explore the etiology of endemic diseases that the lack of Keshan disease and Kashin-Beck disease are closely related. Se and organic matter, enzyme system, especially with other trace elements interaction,