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When it comes to cooking oils, olive oil reigns supreme in the pantry. Known for its rich flavor, it's a go-to for everything from sautéing greens to adding moisture to baked goods. Extra-virgin olive oil, in particular, boasts incredible health perks. But, does olive oil spoil over time? Unfortunately, like all oils, olive oil doesn’t last forever. As a product derived from the fruit of the olive tree, it’s vulnerable to environmental factors like light, heat, and air, which cause it to degrade. This spoilage not only impacts the taste but can also compromise its nutritional value—two key reasons why high-quality olive oil comes at a premium. To keep your olive oil in top form and preserve its rich benefits, make sure to store it properly—and toss it when it’s gone bad.
Petra Olteanu/Getty ImagesHow to Check If Your Olive Oil Has Gone Bad
Just as you would check the smell of milk to see if it’s gone bad, your nose is the most reliable tool for detecting stale olive oil. Take a deep sniff (it may help to pour a little into a small glass first). If you're still unsure, taste a small sip. No need to worry, it won’t harm you. According to Leandro Ravetti, Joint-CEO of Cobram Estates olive oil, “If the oil has an odor or taste of stale nuts, wax crayons, old lipstick, Play-Doh, or spoiled meat, and leaves a waxy, fatty feel in your mouth, it’s probably rancid.” He adds, “If it doesn’t have a fresh, fruity aroma, it’s most likely gone off.”
Can You Still Use Expired Olive Oil?
A small amount of expired olive oil won’t harm you, but using rancid oil regularly can have long-term health effects. Ravetti explains, “When olive oil oxidizes and becomes rancid, the healthy fats in extra-virgin olive oil start to break down, and free radicals form. Free radicals act in opposition to antioxidants and can cause damage inside the body.”
How to Prevent Olive Oil From Spoiling
Preventing olive oil from going bad starts at the supermarket. While buying in bulk might seem cost-effective, it can lead to wasted oil if you don’t use it quickly enough. Ravetti suggests purchasing a bottle you’ll finish in four to six weeks. It’s also best to avoid oils in clear containers, as light can speed up spoilage. Instead, choose olive oil stored in dark glass bottles that will shield the oil from sunlight and extend its freshness. Once you’re home, keep the oil in a cool, dark place, away from heat sources like the stove.
Is Refrigerating Olive Oil a Good Idea?
In most cases, keeping olive oil in the pantry is sufficient. However, if your pantry isn't cool enough, the refrigerator might be a good alternative. Keep in mind that olive oil will solidify when chilled. If you store it in the fridge, take it out about half an hour before use. Alternatively, you can keep a small amount at room temperature and store the rest in the fridge.
What Can You Do With Expired Olive Oil?
The most important thing is to never pour olive oil (or any cooking oil) down the drain, as it can clog your pipes! Instead of throwing it away, consider repurposing it for non-food uses. It can be a great leather conditioner, wood polisher, or even restore the shine to your stainless steel items.
