But is that can really dangerous, or is it simply a victim of misunderstood expiration dates? The truth about canned food shelf life is far less alarming—and far more fascinating—than most people realize.“Best By” or “Best Before” dates indicate when the manufacturer believes the food will taste best. Flavor, texture, and color may slowly decline after this date, but the food itself is usually still safe.

“Sell By” dates are meant for retailers, not consumers. They help stores manage inventory.
“Use By” dates relate more closely to safety, but they are typically applied to perishable items like dairy, fresh meat, or prepared foods—not canned goods.
In short, the date on a can does not mean the food magically becomes unsafe the next day. It simply means the manufacturer can no longer guarantee peak quality.

Canned food is designed to last. During the canning process, food is heated to a temperature that kills bacteria, sealed in an airtight container, and protected from light and oxygen—two major causes of spoilage.
This combination creates an environment where harmful microorganisms struggle to survive. As long as the can remains sealed and undamaged, the contents are protected from contamination.