世界上有 40多个国家和地区缺硒 ,中国约有 2 / 3的地区属国际上公认的缺硒地区 ,其中近 1/ 3又为严重缺硒地区。自 2 0世纪 70年代明确硒为人及动物必需的微量元素以来 ,有关专家对硒与人体健康进行了大量研究 ,结果表明 ,硒在人体组织内的含量虽少 ,但它对人体健康有着不可忽 There are more than 40 countries and regions in the world that lack selenium. About two-thirds of China’s regions are internationally recognized as selenium-deficient areas, of which nearly one-third are severely selenium-deficient. Since seventy time of the 20th century, a clear selenium and trace elements necessary for animals, the experts conducted a lot of research on selenium and human health, the results show that selenium in human tissue content is small, but it has human health can not be ignored