The shelf life of apple cider vinegar is two years unopened, and one year once you've broken the seal on the bottle. You don't have to refrigerate apple cider vinegar once it's opened. Instead, store it in a pantry or cabinet, away from direct sunlight. Apple cider vinegar is highly acidic.

How do you know if Apple cider vinegar has gone bad?

As vinegar ages, it may undergo aesthetic changes, such as becoming hazy or separating. You may also notice cloudy sediments or fibers at the bottom of the bottle. This is largely due to exposure to oxygen, which happens every time you open the lid ( 7 ).

Does apple cider vinegar go bad if not refrigerated?

Short answer: no. Apple cider vinegar does not need to be refrigerated. The acidity of the vinegar effectively ensures that no bacteria will grow in it. Plus, vinegar is itself a preservative - which negates any need to preserve it by putting it in the fridge.