Selenium is an essential trace element that is involved in the synthesis of various selenoproteins in higher animals including humans. Twenty five selenoproteins have been identified in humans. These selenoproteins have various physiological functions. Organic selenium is safer than inorganic selenium and can be used as a nutritional supplement for people who live in selenium-deficient areas. Supera-nutritional intake of selenium has been claimed to prevent cancer, however, consistent clinical results are lacking. At this time, the use of selenium-rich foods by those in selenium-deficient areas might be the safest and best recommendation. This is a brief overview of the requirements for selenium, the selenium enrichment process in plants and animals, and the preparation of typical selenium-rich foods so as to provide some help for the application and development of selenium fortified products.

硒是高等动物（包括人类）中各种硒蛋白合成所必需的微量元素。在人类中已经鉴定出二十五种硒蛋白。这些硒蛋白具有多种生理功能。有机硒比无机硒安全，可以用作生活在缺硒地区的人们的营养补品。硒的超营养摄入被认为可以预防癌症，但是缺乏一致的临床结果。目前，缺硒地区的人们使用富含硒的食物可能是最安全和最佳的建议。这是对硒，动植物富硒过程中硒的要求的简要概述，