亚硝酸盐和仲胺在胃内能合成亚硝胺,后者是人的致癌原。经细菌和唾液的作用存在于各种蔬菜中的硝酸盐可还原为亚硝酸盐。亚硝酸盐和硝酸盐也可由人体内硝化菌内源合成。已知有几种食品在胃内具有降低亚硝酸盐的含量和抑制亚硝胺合成的作用。这些食品有牛奶、小萝卜,经常食用的蔬菜,酒精饮料如 Nitrite and secondary amine in the stomach can synthesize nitrosamines, the latter is human carcinogen. The role of bacteria and saliva exist in a variety of vegetables nitrate can be reduced to nitrite. Nitrites and nitrates can also be endogenously synthesized by human nitrifying bacteria. Several foods are known to have the effect of reducing the content of nitrite and inhibiting the synthesis of nitrosamines in the stomach. These foods are milk, radishes, regular consumption of vegetables, such as alcoholic beverages