近年来,国内外对胃癌发生的流行病学病因假设主要提出了两种假说,一是营养平衡失调假说、二是亚硝胺病因假说。这两个假说正在获得越来越多的流行病学证据,并归纳为下述饮食特点:低动物蛋白和脂肪,高混合碳水化合物;蛋白质来源主要来自谷物和蔬菜;缺乏新鲜水果和蔬菜;高盐和咸制食品 In recent years, hypotheses for the epidemiology of gastric cancer at home and abroad have mainly put forward two hypotheses: one is the hypothesis of nutritional imbalance, and the other is the nitrosamine cause hypothesis. These two hypotheses are gaining more and more epidemiological evidence, and are summarized as the following dietary characteristics: low animal protein and fat, high-mixed carbohydrates; protein sources mainly from grains and vegetables; lack of fresh fruits and vegetables; high Salt and salty foods