美国在历史上,营养研究的重点是营养缺乏病,最近对营养在预防许多重要疾病中的可能作用有了越来越多的认识,如心脏病和卒中、几种癌症、糖尿病、骨质疏松症和肾脏病.美国癌症学会根据对营养因素如何减少癌症发生的危险的理解,提出如下建议:(1)保持理想的体重;(2)吃多样化饮食;(3)日常饮食中含有多种蔬菜和水果;(4)吃更多高纤维食物;(5)减少脂肪总摄入量;(6)限制饮含酒精饮料; The United States Historically, nutrition research has focused on nutritional deficiencies and more recently has gained a growing understanding of the possible role of nutrition in preventing many important diseases, such as heart attacks and strokes, several cancers, diabetes, osteoporosis Symptoms and Kidney Diseases The American Cancer Society makes the following recommendations based on an understanding of how nutrition factors reduce the risk of developing cancer: (1) maintaining ideal body weight; (2) eating a variety of diets; (3) Vegetables and fruits; (4) eating more high-fiber foods; (5) reducing total fat intake; (6) restricting the consumption of alcoholic beverages;