硒是“生命的火种”，在人体中含量虽微，但它对人体生理机能的调控和维持人体最佳营养状态起很大作用、近30多年来．大量研究证实：心脏病、克山病、大骨节病、糖尿病、癌症、白血病、老年性痴呆、老年性白内障等40多种疾病均与硒摄入量偏低有关。正常人血牺合量平均值不应低 Selenium is the “fire of life,” although its content in the human body is small, it plays a great role in the regulation of human physiological functions and in maintaining the best nutritional status of the human body. In the past 30 years or so, A large number of studies have confirmed: heart disease, Keshan disease, Kashin-Beck disease, diabetes, cancer, leukemia, senile dementia, senile cataract more than 40 kinds of diseases are associated with low intake of selenium. Average normal blood loss should not be low