ELI5, How does food not go bad in glass containers?

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I’m sitting here eating salsa that I bought over a year ago, what exactly keeps it from going bad?

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Anonymous 0 Comments

First, you’re taking a bit of a gamble there. It might not _taste_ bad, but that doesn’t mean it isn’t.

With that said, there are many factors that’ll keep food from spoiling. Properly sealed food with all the air removed is one (and that might be the case with your salsa). The food itself being inhospitable to bacteria is another, and refrigiration is yet another factor.

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