The “sell by,” “best by,” or “expiration” date on packaged food is usually only a suggestion. I have eaten plenty of canned beans, energy bars, and corn chips after the date on the package, and I’ve never been sick. Occasionally items with no preservatives or heavy with nuts or oils might taste rancid, but I don’t usually notice that unless an item is more than three months past the date on the package. If I’m skeptical, I’ll buy just one of the item in question, taste it, then make my decision.