对硒抗癌作用的辨析

A DISCUSSION ABOUT ANTICARCINOGENIC EFFECT OF SELENIUM TO MAN

早已证实硒是一种微量营养元素，过量又可引起中毒。最近国内外许多学者提出硒具有抗癌作用的论点，但作者认为其论据——动物实验和流行病学的调查结果迄今还不能充分证明这一点。因此，作者建议不要为防癌盲目地增加膳食中硒的含量。此外，还应对环境进行认真监测，以使其硒含量不超过安全标准。

It has long since been proved that selenium is a micronutrient,but an excessiveamount of it is harmful to animals,Selenium has recently acquired significance in the study of hu-man cancer because of a possible inverse relationship between dietary selenium levels and the inci-dence of cancer,evidence of selenium being anti-carcinogenetic comes from two sources-experi-ments with animals and epidemiological studies of human populations. However,neither is com-pletely convincing as yet. So increasing selenium intake for man to prevent cancer is not proper.Moreover,the environment ought to be monitored so that the content of selenium does not exceedthe safe criterion.