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How Long Does an Opened Box of Chicken Stock Last in the Fridge?

It depends on the brand. Some brands say one week, while others say two. To tell if chicken stock has expired, smell it. If it has a stronger smell than plain chicken stock, it’s time to toss it.

To help remember when to use it by, write the expiry date on the chicken stock box when you open it. If you can’t use it before that date, freeze it in a separate container and use as soon as its convenient.