為什麼超市裡的雞蛋這麼乾淨？

雞蛋是我們生活中的營養寶庫。它們為身體提供高品質的蛋白質、維生素A、卵磷脂、鈣、鐵、磷等營養素，並且有多種美味的食用方式。許多人在超市促銷時會購買更多雞蛋，但問題來了：為什麼超市裡的雞蛋這麼乾淨？這麼多雞蛋應該如何保存？

為什麼超市裡的雞蛋這麼乾淨？

The vast majority of eggs sold in supermarkets today are preserved eggs, not eggs in their original form. Clean eggs are eggs that have been specially treated by cleaning and drying, egg breakage detection, food-grade ink coding, oil spraying to preserve freshness, ultraviolet disinfection, weight grading, and tray packaging. It removes the residual feathers, feces, and other harmful objects on the egg shell, and kills and inhibits microorganisms from invading the egg body to protect the health of the person consuming it. Eggs that have not undergone these processes have a protective film of their own when they are first laid, but this film will gradually disappear over time and eventually become less fresh; the oil film of clean eggs lasts longer than the egg’s own protective film and helps preserve them.

消費者在購買雞蛋後應該洗嗎？

在超市中，若雞蛋包裝本身已經進行了清洗和滅菌等步驟，表示在出廠前已經完成這些處理。雞蛋還會塗上一層可食用的礦物油，以防止細菌污染並延長保存時間。如果雞蛋是乾淨的且帶有雞糞，出於安全考慮不建議洗滌，因為它們有自己的保護膜，過度清洗會破壞這層保護，讓細菌有機會侵入，從而損壞雞蛋並導致變質。我們建議可以輕輕擦拭髒的部分，不要觸碰乾淨的部分，然後放入冰箱保存。

如何存放雞蛋？

1. 儘量購買標示清楚的雞蛋，並遵循蛋包裝和標籤上的有效期限和存放溫度。

2. 一般來說，雞蛋不需要洗，但如果被鳥糞污染，可以用水清洗。清洗後的雞蛋應立即烹煮。

3. 避免生吃或未熟的蛋及蛋製品，尤其是老年人、嬰兒和孕婦。雞蛋應充分煮熟，直到蛋黃和蛋白完全凝固。