2 Answers

You can store canned goods until the "use by" date expires. Expiration dates exist for a reason. They indicate how fresh and safe the food inside will be when you open the can. As a rule, acidic foods like tomatoes expire more quickly than non-acidic foods such as green beans. For the best quality, use canned goods before the printed expiration date.

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It depends upon what kind of food. If it is frozen, you can keep it for a few months.  If you keep it in the fridge, I think it would last no more than two days. You should not keep food for longer as the bacteria grows and it can effect your heart.