Some condiments seem to last forever, but mayo isn't one of them. Just how long can this creamy condiment last before it has to be thrown in the trash?

Before it's opened, a jar of mayonnaise has a pretty decent shelf life. It can stay at room temperature for about three or four months past the printed best-by date. That time doesn't reduce too much ...

However, the warm weather can accelerate the spoilage of mayonnaise, making it essential to know how to determine if it has gone bad. Here are some key signs to look out for to ensure your ...