硒(Se)是一种人体必需的微量元素。成人体内硒的总含量约为3～20毫克。硒遍布于人体各器官和体液中,肾中硒的浓度最高,肝脏次之,血液中相对低些,肌肉中的硒约占人体硒含量的一半。硒对人体的作用非常重要,可以增强抗癌能力,可以提高人体免疫力,可以防治多种疾病,可以保健 Selenium (Se) is a human body essential trace elements. The total content of selenium in adults is about 3 ~ 20 mg. Selenium is found in various organs and body fluids of the human body. The highest concentration of selenium in the kidney, the second in the liver, and the relatively low level in the blood are the selenium in the muscle which accounts for about half of the body’s selenium content. Selenium on the role of the human body is very important, can enhance anti-cancer ability, can improve human immunity, can prevent a variety of diseases, health care