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酸奶沒過期但是變酸了

來源:鮮淘網 2019-07-25 13:00:15      鮮淘網麗麗 手機版

　　酸奶沒過期但是變酸了可能與包裝的密封有關。酸奶需要殺菌后密封處理，如果包裝沒有密封好，即使沒過期，空氣中的灰塵、細菌也會進入酸奶里，細菌導致發酵就會變酸。此外，酸奶要一直在低溫下儲存，如果是高溫環境下，酸奶里酵母活躍就容易變酸。

　　酸奶沒過期變酸的原因

酸奶沒過期但是變酸了

　　判斷酸奶有沒有變質的方法：

　　1、看包裝：首先看保質期和生產日期，然后檢查包裝是否有破損，變質的酸奶會因內部發酵而產生大量氣體，所以包裝很鼓的也不能喝。

　　2、看儲存環境：酸奶在高溫環境下，酵母菌會變得活躍，容易變質，酸奶最好保存在2-6℃之間的冰箱或冷柜內，且在保質期內要喝完。

　　3、聞氣味：新鮮的酸奶氣味清淡、有奶香，相反變質的酸奶有濃重的酸味。

　　4、嘗味道：聞不出來可以嘗一點，變質的酸奶會比之前變的更酸，味道和新鮮酸奶完全不一樣。

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