Olive oil is more than just a kitchen staple—it’s liquid gold. Rich in heart-healthy fats and antioxidants, it plays a starring role in Mediterranean diets and is often praised for its health benefits. But here’s the catch: not all olive oil is created equal.
From the shelves of your supermarket to boutique grocers offering fancy bottles with golden labels, the variety of olive oils can be overwhelming. So how do you know you’re getting the real deal—and not a bland or rancid imposter? Here’s everything you need to know about choosing pure, healthy olive oil and storing it the right way.
First Things First: What Is Olive Oil?
Olive oil is made by pressing whole olives to extract the juice, much like fruit juice. The best and healthiest kind is extra virgin olive oil (EVOO). This means it’s made without the use of heat or chemicals and contains no defects in flavour, aroma, or acidity. It’s unrefined, which means it retains more of its natural antioxidants and polyphenols—the compounds that give olive oil its powerful health benefits.
Refined olive oils, on the other hand, have been processed to remove impurities (and often, flavour and nutrients), making them less beneficial for your health.
Not All Olive Oils Are The Same
Unfortunately, terms like “pure,” “light,” or “olive oil blend” can be misleading. Here’s what they really mean:
- Extra Virgin Olive Oil (EVOO): The gold standard. Cold-pressed, unrefined, with low acidity and a robust taste.
- Virgin Olive Oil: Also unrefined, but with a slightly higher acidity and less intense flavour.
- Pure or Light Olive Oil: These are refined oils mixed with small amounts of virgin or extra virgin oil. They have fewer nutrients and a neutral taste.
- Olive Pomace Oil: Extracted from the pulp left after the first press using solvents. It’s the lowest grade and not recommended for consumption if you’re after health benefits.
How To Spot A Quality Olive Oil
When choosing a bottle, keep these tips in mind:
✅ Look for “Extra Virgin” on the label. This ensures it’s the highest quality with minimal processing.
✅ Check the harvest or best-by date. Fresher is better. Olive oil doesn’t age like wine—it degrades over time. Look for oil harvested within the last year.
✅ Choose dark bottles. Light is olive oil’s enemy. A dark glass bottle or a tin container protects it from light exposure that causes oxidation.
✅ Know the source. Look for oils that name the country or region of origin, and better yet, the specific estate or mill. Some of the most reliable producers are based in Italy, Spain, Greece, and Australia.
✅ Go for single-origin oils. These typically come from one location or farm and are less likely to be blended with lower-quality oils.
✅ Look for certifications. Seals like PDO (Protected Designation of Origin), PGI (Protected Geographical Indication), or certifications from associations like the California Olive Oil Council (COOC) or the North American Olive Oil Association (NAOOA) add credibility.
Taste It (If You Can!)
High-quality extra virgin olive oil should have a rich aroma and a bold, slightly bitter or peppery taste—that bite at the back of your throat is a good sign. It’s proof of those powerful polyphenols at work.
How To Store Olive Oil Properly
Even the best olive oil can go bad if you don’t store it correctly. Here’s how to keep yours fresh:
- Keep it cool—but not cold. Store your oil in a cool, dark cupboard away from the stove and sunlight. Avoid refrigeration, which can alter the taste and consistency.
- Use it within 6 months of opening. Once exposed to air, the oil starts to degrade. Try to use your bottle within a few months of opening.
- Close the cap tightly. Oxygen speeds up oxidation, so always reseal the bottle properly after use.
Can Olive Oil Go Rancid?
Yes, it can—and it often does if left too long on the shelf or stored improperly. Rancid olive oil may smell like crayons, play dough, or stale nuts. It won’t make you sick, but it certainly won’t deliver the health benefits (or the taste) you’re after.
If in doubt, give it a sniff or a small taste. If it smells off or tastes flat and greasy instead of fruity or peppery, it’s time to toss it.
The Bottom Line
Olive oil is a healthy, flavourful ingredient—but only if you choose and store it wisely. Stick with fresh, extra virgin oils in dark bottles, check the labels for origin and harvest date, and keep it away from heat and light. Your salads, sautés, and your heart will thank you.