大白菜是冬令佳蔬,它物美价廉,食用方便,营养丰富,味美可口,适量食用对人体大有裨益。但在食用时:一忌隔夜的熟白菜,二忌未经腌透的生白菜,三忌腐霉变质的烂白菜。众所周知,新鲜的大白菜含有多量无毒的硝酸盐。如果白菜贮存或烹调腌制不当,硝酸盐就会在细菌的作用下转变为亚硝酸盐。亚硝酸盐进入人体后,与血红蛋白结合,形成高铁血红蛋白,使血液丧失运输和携带氧气的功能,致使全身组织和器官 Chinese cabbage is winter vegetables, it is inexpensive, easy to eat, nutritious, delicious and delicious, moderate consumption of great benefit to the human body. However, when eating: a bogey cooked cabbage overnight, two bogey uncooked raw cabbage, three rotten rot rotten cabbage. As we all know, fresh Chinese cabbage contains large amounts of non-toxic nitrate. If cabbage is stored or cooked improperly, nitrates turn into nitrites under the action of bacteria. Nitrite into the body, combined with hemoglobin, the formation of methemoglobin, the blood loss of transport and carry oxygen function, causing the body tissues and organs