硒是人体必需微量无素之一。它具有奇妙的功能。有人测定百岁老人血液中硒含量比一般健康人高3倍以上。然而一般人随年龄增长,血中硒含量逐渐降低。芬兰有的医生给15例老年病人注射含硒药物,结果精神状态、体力、机敏程度都有明显改善。硒之所以有此功能,是 Selenium is one of the essential trace elements in the human body. It has wonderful features. Some people determine the selenium content of blood in centenarians more than three times higher than the average healthy person. However, most people increase with age, blood selenium levels gradually decreased. Some doctors in Finland to 15 cases of elderly patients with selenium injection, the results of mental state, physical strength, alertness has been significantly improved. The reason why selenium has this function is