《美国医学会杂志》第246卷第14期(1981年)报道:金属性硒的贮量在地球所有元素中排列第17位。某些硒化合物具有潜在毒性,但硒显然又为人体健康所必需。多少年来在人体所需的微量元素中,硒的价值还未完全确定。最近的研究报告已引起了公众的注意。硒可能是癌前病变的抑制剂。报告之一是由休斯敦贝勒医学院细胞生物学教授美狄纳(Dani-el- Medina)提出的。他在佛罗里达海滨举行的美国肿瘤协会讨论会上说,硒在动物体内能 Journal of the American Medical Association, Vol. 246, No. 14 (1981) reports that the reserves of metallic selenium rank 17th among all elements of the planet. Certain selenium compounds are potentially toxic, but selenium is clearly necessary for human health. For many years in the human body needs trace elements, the value of selenium has not yet been fully determined. Recent research reports have drawn the public’s attention. Selenium may be an inhibitor of precancerous lesions. One of the reports was presented by Dani-el-Medina, a professor of cell biology at Baylor College of Medicine in Houston. He told the American Cancer Society Symposium held on the Florida beachfront that selenium can be found in animals