How long is mayonnaise safe?

Mayonnaise can typically be safely stored in the refrigerator for about 2 to 3 months after opening, as long as it is kept in a sealed container and maintained at a consistent cold temperature. Unopened mayonnaise can last for several months beyond the expiration date if stored in a cool, dry place. Always check for signs of spoilage, such as off odors or changes in texture, before consumption.