世界卫生组织2001年报告说,全球有超过20亿人患缺铁性贫血,铁缺乏的状况在发展中国家尤其严重。2002年中国居民营养与健康状况调查报告表明,中国居民贫血患病率平均为15.2%,其中两岁以下婴幼儿、60岁以上老年人和育龄妇女贫血患病率分别为24.2%、21.5%和20.6%。早在2001年,我国学者报告的两项研究表明,铁强化酱油具有改善人体铁营养的效果。一项在300名贫血学生中进行的干预研究证明,这些人每天补充5毫升铁强化酱油,可以在3个月内 WHO reported in 2001 that more than 2 billion people worldwide suffer from iron-deficiency anemia and that iron deficiency is particularly severe in developing countries. The 2002 survey of nutrition and health status of Chinese residents showed that the prevalence of anemia among Chinese residents was 15.2% on average, of which the prevalence of anemia among infants under 2 years old, over 60 years old and women of childbearing age were 24.2% and 21.5%, respectively 20.6%. As early as 2001, two studies reported by Chinese scholars showed that iron-fortified soy sauce has the effect of improving human iron nutrition. An intervention study of 300 anemic students demonstrated that these people add 5 milliliters of iron-fortified soy sauce every day for three months