面粉保质期一般是多久?放了一年还能吃吗?过期有什么...(白面保质期多长时间)

发布时间：2022-11-24 19:13:06 来源：互联网整理浏览：【大】【中】【小】

面粉保质期一般是多久?放了一年还能吃吗?过期有什么...(白面保质期多长时间)，

面粉是一种由小麦磨成的粉状物。按面粉中蛋白质含量的多少，可以分为高筋面粉、中筋面粉、低筋面粉及无筋面粉，从等级上看，我们又可以把面粉分为特等粉、一等粉、二等粉等各个等级。在我们生活中食用的比较多，尤其是北方大部分地区都是以面食为主。那么，面粉保质期一般是多久？放了一年还能吃吗？过期有什么危害？

面粉保质期多久？

面粉的保质期限，一般在购买时的包装袋上都会有标明的，一年或12个月。常温下，面粉的保质期应该在3个月到12个月都有。季节和包装方式不同，保质期也会相对的延长或是缩短。南方天气比价潮湿，zui好储存在相对阴凉干燥的地方，北方相对好些，只要不放在温度高的地方就行。把面粉放在真空袋中，可使面粉的保质期适当的延长，不过，面粉还是少量多次买，毕竟时间长了，面粉营养物质的成分就越低，还会生虫变黄，所以不要怕麻烦，要用的时候再买。

放了一年还能吃吗?

首先，从面粉进口的角度出发，进口面粉有两种方式进口，一种是零售包装，就是小包装家庭装面粉，这种小包装的面粉是在生产时就添加防腐剂和高温杀菌，且包装防潮防磨，一般保质期1年到2年;另外一种是大包装(俗称业务装)，一般是50KG和100KG的麻袋装，这种包装虽然也经过添加防腐剂和干燥剂，包装防潮防磨损比较差，只适合面包店和餐厅使用，不适合零售，保质期一般为1年。

所以大家参考自己买的是何种面粉，再对应是否可以食用。

面粉过期了有什么危害?

面粉过期危害巨大，面制品有个通病，就是时间放长了之后会长虫，虫卵在生产时一般会用高温杀死，但还是会有部分虫卵留存，一旦时间超过半年，温度湿润就会激活从而长虫。这种虫行业叫粉甲虫，会产生一种叫“苯醌”的毒素，这种是典型的致癌物。

其他拓展知识
1:面粉在较低的温度储存则保质期更长,通用面粉放在20摄氏度的温度可保存一年左右,放在4摄氏度的冰箱冷藏保存,则可以存更长时间不会出现变质。如果有一大袋面粉一时之间用不完,可以把...

2:面粉袋子上的保质期也是在不开封的情况下，还要妥善存放才能保质一年，而不是你打开后就能在一年当中都可以吃的，这个要看你如何存放，有没有密封防潮的条件管理，切不可一概而论。...

3:通常情况下,面粉的保质期为12个月左右,过期了就不能吃了。面粉可以提供人体必要的碳水化合物,富含蛋白质,一旦过了保质期,此类营养物质会促进细菌大量繁殖,导致面粉被细菌污染...","subtitleWithAvatar":[{"text":"冯一副主任医师上海交通大学医学院附属新华医院三甲发布时间: 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2021年12月17日通常情况下,面粉的保质期为12个月左右,过期了就不能吃了。面粉可以提供人体必要的碳水化合物,富含蛋白质,一旦过了保质期,此类营养物质会促进细菌大量繁殖,导致面粉被细菌污染...有来医生网  播报  暂停