Take a look around your kitchen and most packaged foods will have some kind of date: “sell by,” “best by,” “use by,” and more—but they don’t all mean the same thing or automatically signal that a food is unsafe. With grocery prices high and 30 to 40 percent of the U.S. food supply going to waste , do you really need to toss that yogurt that’s a few days past its expiration?

Here's what you need to know about these so-called expiration labels, plus what the food experts say you most definitely shouldn't eat after it's expired.

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The Truth About Expiration Date Labels

“Generally speaking, expiration dates in the U.S. don’t mean a lot,” says Laurie Beyranevand, director of the Center for Agriculture an

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