食口添加剂是指为改善食品品质和色、香、味以及防腐和加工工艺的需要，加入食品中的化学合成物质或天然物质．由于食品添加剂毕竟不是食物的天然途可分为防腐剂、抗氧化剂、调味剂、甜味剂、催熟剂、保鲜剂、染色剂等等．添加剂绝大多数是人工化学合成的，对人体有不同程度的 Food additives are food additives to improve the quality and color, smell and taste, as well as preservatives and processing needs, added to food chemicals or natural substances. Because food additives, after all, are not natural foods can be divided into preservatives, antioxidants, flavoring agents, sweeteners, ripening agents, preservatives, stains and so on. The vast majority of additives are chemically synthesized, to different degrees to the human body