Refrigerate after opening, but not before?

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Had a conversation with my wife today about the unopened mayo we had sitting in the pantry and it made me think – how does it make sense for a food (for instance mayo) to sit in a 65-70 degree pantry for months and be perfectly fine, but as soon as it’s opened it needs to be refrigerated. In my mind, if something needs to be refrigerated at any point, wouldn’t it always need to be refrigerated? The seal on the unopened product keeps the item safe, and the refrigerator does that when the seal is off? How do those two things relate?

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Anonymous 0 Comments

As long as the jar is sealed, it has been sealed with no bacterias in it. Bacterias are the whole and only reason why food spoils. The moment you open it, bacterias from the air start filling in and feasting on the stuff.

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