Yes, olive oil does go bad, but it takes time. Unopened olive oil typically lasts 18 to 24 months before it starts to become rancid. This is because olive oil is made from a fruit, and fruits have a limited shelf life.
Here are some signs that olive oil may be going bad:
- Cloudy appearance: If you store olive oil in the refrigerator, it may become cloudy as the fats partially solidify.
- Off odor or taste: Rancid olive oil will have a musty or unpleasant smell and taste.
- Change in color: Olive oil may turn darker or take on a greenish hue as it ages.
How to extend the shelf life of olive oil:
- Store in a cool, dark place: Light and heat can accelerate the oxidation process, which causes olive oil to go bad.
- Use a glass bottle: Plastic can leach into olive oil, affecting its flavor and quality.
- Keep the bottle tightly sealed: Exposure to air can cause oxidation.
- Avoid using olive oil past its expiration date: While olive oil can be safe to consume beyond its expiration date, its flavor and quality will have deteriorated.
Remember that extra virgin olive oil tends to have a shorter shelf life than refined oils. This is because it contains more antioxidants and polyphenols, which contribute to its flavor and health benefits, but also make it more susceptible to oxidation.
