Could Dressing Go Bad?

Salad dressings last for 1-4 months beyond the date printed on the bottle, depending on several variables discussed below. The shelf life of salad dressing lasts beyond the sell by date or best by date if unopened or stored properly in the refrigerator.

How can you tell if dressing is bad?

First off, it's the presence of mold or an off aroma. If either is the case, throw out the dressing. Same thing if it's an oil-based dressing and smells rancid.

Is it OK to eat expired dressing?

Is it safe to eat when it's expired? If your dressing is past that best-by date, it's still OK to eat, so don't feel like you have to throw out perfectly good dressing just because of an arbitrary deadline. That said, you definitely want to keep an eye on it and look out for any funky smells, bumps, or colors.