![]() ![]() If your olive oil tastes bitter, sour, or stale, it’s no longer good. Don’t worry, a small taste won’t make you sick. The best way to tell whether your olive oil has gone rancid is by tasting it. There are a few ways to determine whether your olive oil is bad. Store it in a cool, dark place and, ideally, in a dark glass or tin container that’s well sealed. Olive oil goes rancid after 18–24 months, or 12–18 months if it’s extra virgin olive oil. If you don’t cook often, it may also be a good idea to purchase smaller bottles, especially if you’re opting for a fancier olive oil. This is why a cool, dark place is ideal for storing your olive oil - and make sure that it has been properly capped once you’ve opened it.įinally, if your olive oil comes packaged in a plastic polyethylene container and you plan to keep it around for a while, it may be wise to transfer it to a dark glass or tin container. Besides light, olive oil can also be oxidized by contact with oxygen or exposure to heat ( 2). In olive oil, it can speed the breakdown of fat molecules. Oxidation is a cellular process that can stimulate aging. This may be something to watch for when you’re at the grocery store ( 2). Generally, it also helps if the bottle is made from a darker glass, like dark green or amber, as this can help block out light, which promotes oxidation. This is a normal reaction to cooler temperatures and does not indicate that your olive oil has gone rancid. Keep in mind that if you store it in your refrigerator, it may look a bit cloudy. You should store olive oil in a cool, dark place - like a pantry with a door, a cabinet, or a refrigerator. This can help you have some sense of how long it has been sitting in your pantry. If you don’t see these, it may be a good idea to tag your bottles with the date of purchase. Some olive oil bottles state a bottling or best-by date. Extra virgin olive oils are less processed and usually last a bit less, around 12–18 months from the time they’re bottled ( 1).īeyond these timespans, olive oils may develop acrid or bitter notes, which may show up in your cooking in ways you may not enjoy. Most olive oils last 18–24 months from the time they’re bottled. There’s a point at which it goes rancid and simply doesn’t taste great. ![]() Fruits have a shelf life, and by extension, so does olive oil. ![]() Botanically, the olive ( Olea europaea) is considered a fruit. ![]()
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