亚硝酸盐是一种有毒物质,若和人体内的胺类物质结合可形成亚硝胺,有害身体健康。目前,医学已证明亚硝胺是一种强致癌物。蔬菜是一种天然易富集硝酸盐的植物食品,人体摄入硝酸盐有81.2%来自蔬菜,但硝酸盐经微生物作用极易还原成亚硝酸盐。不同种类的蔬菜含硝酸盐差异很大,通常根、茎、叶菜 Nitrite is a poisonous substance that can form nitrosamines if it is combined with the body’s amines, which is detrimental to health. At present, medicine has proved that nitrosamines are a strong carcinogen. Vegetable is a naturally-rich nitrate-rich plant food. 81.2% of the nitrate in the human body comes from vegetables, but nitrite can be easily reduced to nitrite by microorganisms. Different types of vegetables contain very different nitrates, usually root, stem, leafy vegetables