微量元素 Se 为瑞典化学家具采利乌斯所发现。长期以来,人们认为硒是一种有毒物质,40年代认为硒是致癌物,70年代学者研究排除了硒的致癌性,而且还证实硒有明显的抗癌作用。我国60年代末已用亚硒钠防治克山病而后又用于大骨节病的防治,取得显著效益,引起世界学者的重视,迎来 Trace elements Se for the Swedish chemist Julius Caesar discovered. For a long time, people think that selenium is a kind of poisonous substance, selenium is a carcinogen in the 1940s, seventy scholar studies excluded the selenium carcinogenicity, but also confirmed that selenium has a clear anti-cancer effect. In the late 1960s, we have used sodium selenite to prevent Keshan disease and then used it to prevent and cure Kashin-Beck disease, thus achieving remarkable benefits and attracting the attention of world scholars.