What is extra virgin olive oil?
What is Extra Virgin Olive Oil?
Extra Virgin Olive Oil (EVOO) is the highest quality grade of olive oil. It is pure olive juice, extracted by mechanically pressing fresh olives — without heat, chemical treatment, or refining. The result is an oil that retains the full flavor, aroma, and nutritional value of the olive.
Definition and EU Standards
According to the International Olive Council (IOC) and EU Regulation 1308/2013, extra virgin olive oil must meet strict requirements:
- Free Fatty Acid (FFA) content: maximum 0.8% (expressed as oleic acid)
- Peroxide value: maximum 20 mEq O₂/kg
- UV absorption (K268): maximum 0.22
- Sensory assessment: no defects, fruitiness present (panel test)
- Production method: exclusively mechanical, without chemical extraction
Difference from Regular Olive Oil
| Characteristic | Extra Virgin | Regular Olive Oil | Olive Pomace Oil |
|---|---|---|---|
| Production method | Cold-pressed, mechanical | Refined + a little EVOO | Chemically extracted |
| Free Fatty Acid | <0.8% | <1.0% | <1.0% |
| Polyphenols | High (50–800 mg/kg) | Low (<50 mg/kg) | Very low |
| Taste | Fruity, bitter, pungent | Neutral | Neutral to light |
| Health claim possible? | Yes (≥250 mg/kg polyphenols) | No | No |
Health Benefits of Extra Virgin Olive Oil
Extra virgin olive oil is the cornerstone of the Mediterranean diet, recognized by the WHO as one of the healthiest eating patterns in the world. Its benefits include:
- Heart health: monounsaturated fats (oleic acid) lower LDL cholesterol
- Anti-inflammatory: polyphenols like oleocanthal and oleuropein inhibit COX enzymes
- Antioxidant action: protects cells from oxidative stress
- Brain function: regular use is associated with a lower risk of dementia
Olive oil with ≥250 mg/kg polyphenols may carry the officially EU-recognized health claim (EU Regulation 432/2012).
How to Recognize Real Extra Virgin Olive Oil?
Unfortunately, the market is full of olive oil sold as 'extra virgin' that isn't. Signs of true quality EVOO:
- Harvest date stated on the bottle (not just best-before date)
- Origin from a single region or producer (not a blend from multiple countries)
- Dark bottle or tin (light breaks down polyphenols)
- Slight tingling sensation in the back of the throat when tasting (oleocanthal)
- HPLC certificate or polyphenol content stated
Frequently Asked Questions
Can I heat extra virgin olive oil?
Yes. Extra virgin olive oil has a smoke point of approximately 180–210°C, depending on its quality. This is suitable for most cooking methods. However, polyphenols are partially broken down at high temperatures; raw use provides the most health benefits.
How long does extra virgin olive oil last?
Unopened: typically 18–24 months after harvest. Opened: consume within 3–6 months for best flavor. Store in a cool, dark place — not in the refrigerator.
What does 'cold-pressed' mean?
Cold-pressed means the olives were pressed at a temperature below 27°C. This preserves more polyphenols, vitamins, and aromas than warm extraction. All true extra virgin olive oil is cold-pressed.
What is the difference between early and late harvest?
Early harvest (September–October) yields oil with more polyphenols, a more intense green-fruity flavor, and higher health-promoting compounds. Late harvest (November–December) produces a milder, golden-yellow oil with fewer polyphenols but a softer profile — ideal for everyday cooking.