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自70年代以来,美国人的膳食结构发生了很大的变化,即向着更合理、更健康的方向发展。人们日益感到食品对健康的重要性,对“健康食品”的需求越来越大。 这一方面是由于大众传播媒介和公共卫生与健康机构的大力宣传。例如,早在1977年,美国政府、健康组织和全国科学委员会就制订了不下15套推荐膳食标准。随后,美国农业部,全美医药协会、美国肿瘤学会
Since the 1970s, the American dietary structure has undergone major changes, namely, a more rational and healthy development. People are increasingly feeling the importance of food for health and the demand for “healthy foods” is increasing. This is due to the strong publicity of the mass media and public health and health institutions. For example, as early as 1977, the U.S. government, health organizations, and the National Science Council formulated no fewer than 15 sets of recommended dietary standards. Subsequently, the U.S. Department of Agriculture, the American Medical Association, and the American Society of Oncology