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789

满满一桌料理,大快朵颐后没吃完该如何处理?“等菜放凉一点再放进冰箱吧!”不少人可能会这么想,但这可是大错特错的观念!
人们普遍对于食物保存观念错误,其中高达75%人习惯将热食在室温下放凉数小时,再放入冰箱;也有不少民众没有定期整理冰箱的习惯。这些错误观念可能引来4大健康危害:
1.食物放凉逾2小时生毒素
传统观念认为太热的食物放进冰箱,会导致冰箱使用寿命变短。但提醒,细菌会在5°C到60°C的环境下大量繁殖,更可能产生仙人掌杆菌等耐热的毒素,即使再次加热烹煮也难以消除;因此,无论是熟食、解冻中的生食或腌渍食物,都不建议放置在室温下超过2小时。
2.未整理冰箱 吃变质食物致病
不少民众没有定期整理冰箱的习惯,常常在冰箱里有食物变质、发霉或发出怪味才开始清理。食用变质食物可能导致食物中毒或使活性氧累积,对DNA、脂质、蛋白质等物质产生破坏,也可能导致病变发生。
3.解冻肉品流血水 营养流失
解冻肉品时,随着血水流出,食材的风味和营养也跟着流失。想要保留最多营养,可使用微波炉解冻,能避免错误解冻而出现血水,导致水溶性营养大量流失,也比其他解冻方式更为均匀受热,能保留食材口感。
4.保存温度过低 色香味尽失
有部分民众存有“温度愈低食物,保鲜效果就愈好”的错误迷思。其实,温度过低或结冻时间过长,都会使食物内水分结成过大冰晶,造成细胞膜(壁)变形及破坏,不仅影响食物色泽与润泽口感,营养更可能随着水分流失。
想要保有食材的原汁原味,“控温”是关键,食物最佳保存温度为±1℃,食物冷冻不宜低于结冰点-2℃;若有长期保存肉品的需求,建议采取急速冷冻,使冰结晶微小化,才不会破坏食材组织,保留鲜美口感并避免营养和风味流失。
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