Why are shelf stable food items (like sauces, broths, etc) recommend to be used within a few days after opening? Do they actually go bad?

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I tend to keep condiments and things of that nature for a very long time in my fridge even though most Google searches say use within 3-5 days after opening. How can a sauce or can of broth or any other shelf stable thing last for months, if not longer, in my pantry, but if I open to use it for a few seconds and put it in my fridge it’s supposed to be used with if a few days? I’m talking anything from pickles to mustard to broth. All of those items seem perfectly fine in the fridge even after weeks or sometimes months.

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6 Answers

Anonymous 0 Comments

short answer: the sealed pack is sterile, but thats not the case once its opened.

during manufacture, they can take various steps to ensure that the contents of the foodstuff are basically microbe free (or, at least, anything that was sealed inside them was killed afterwards). So long as the seal is good, that food wont rot for a very long time.

once you open it, all the bacteria in your kitchen can get into it, and it will begin to rot.

also, most “use by” dates and recommendations are a bit conservative, as they dont want to be liable for saying food that MIGHT be off is ok, so they underestimate on the packaging for safety.

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