Signs That Olive Oil Has Gone Bad (And How To Prevent It From Spoiling)

Olive oil is a staple in many kitchens, but it's a delicate product that can spoil if not handled correctly. Understanding the signs of spoilage will ensure your meals stay delicious and safe.

This guide explains how to spot the signs and how to protect your oil from going bad.

The smell test

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Annette Riedl/picture alliance via Getty Images
Annette Riedl/picture alliance via Getty Images

Olive oil has a distinct olive smell, so it should be easy to tell if it's still fresh. If you open the bottle to a waxy, crayon-like smell, your oil is likely rancid.

This happens when the fats break down due to oxidation. Once that fresh aroma disappears, the oil is no longer suitable for your favorite cooking or dressing recipes.

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The taste and texture

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Nikos Pekiaridis/NurPhoto via Getty Images
Nikos Pekiaridis/NurPhoto via Getty Images
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Rancid olive oil often feels greasy or leaves a waxy coating in your mouth. The flavor might be flat or unpleasantly bitter instead of having that signature peppery kick.

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If the oil tastes stale, it's time to discard it. Good oil should feel clean and vibrant on your tongue rather than heavy and dull.

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Proper storage

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Brandon Bell/Getty Images
Brandon Bell/Getty Images
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Light, heat, and air are the primary enemies of olive oil. To keep it fresh, store your bottle in a cool, dark cupboard away from the stove.

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Avoid keeping it on the counter where sunlight can reach it. Always seal the cap tightly after every use. These simple steps prevent the chemical reactions that turn healthy fats into spoiled ones.

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The takeaway

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Mike McGinnis/Getty Images for HumanaVitality
Mike McGinnis/Getty Images for HumanaVitality
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Taking care of your olive oil preserves its quality and protects your health. By paying attention to how it smells and tastes, you can avoid ruining your favorite dishes.

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Use these tips to keep your kitchen stocked with the best ingredients possible for your next home cooked meal.