“Extra virgin olive oil” is not a marketing phrase. It is a legally defined category with limits that are checked in a laboratory and by a trained tasting panel. Once you know the numbers behind it, a label on a Swiss shelf reads differently – and it becomes clear why a bottle at CHF 4 and one at CHF 25 may carry the same words.
What the term means in law
The trade descriptions for olive oil are set out in Regulation (EU) No 1308/2013; the limits are in Annex I to Delegated Regulation (EU) 2022/2104 and the analytical methods in Implementing Regulation (EU) 2022/2105, which together replaced the earlier Regulation (EEC) No 2568/91 at the end of 2022. The International Olive Council (IOC) applies essentially the same values in its trade standard. Switzerland is outside the EU agricultural market rules but imports almost all of its olive oil from the EU, so the bottles at Migros, Coop, Denner and Aldi carry the EU categories.
To be called extra virgin, an oil has to pass two tests – one chemical, one sensory. They count equally. If the panel rejects the oil, perfect laboratory values do not help: it is no longer extra virgin olive oil, whatever the label says.
The limits at a glance
The first two columns are the categories you find on the shelf. Lampante oil may not be sold as it is; it has to be refined first.
| Measure | Extra virgin | Virgin | Lampante |
|---|---|---|---|
| Free acidity (as oleic acid) | max. 0.8 g/100 g | max. 2.0 g/100 g | over 2.0 g/100 g |
| Peroxide value | max. 20 meq O₂/kg | max. 20 meq O₂/kg | – |
| K₂₃₂ (UV absorbance) | max. 2.50 | max. 2.60 | – |
| K₂₇₀ (UV absorbance) | max. 0.22 | max. 0.25 | – |
| Median of defects (panel) | exactly 0 | max. 3.5 | over 3.5 |
| Median of fruitiness (panel) | above 0 | above 0 | – |
Two further descriptions appear on shelves, both containing refined oil: refined olive oil (max. 0.3 g/100 g acidity) and “olive oil – composed of refined and virgin olive oils” (max. 1.0 g/100 g). The latter is what is often sold simply as “olive oil”. It is not bad, but it is a different product: neutral in taste, without the polyphenols that make virgin oil worth buying.
How the oil is made
Extra virgin olive oil is obtained by mechanical means only: the olives are washed and crushed, the resulting paste is stirred (malaxation) and then centrifuged. No solvents, no chemical refining, no heat treatment beyond what the process itself produces.
What matters most is the time between picking and milling. The longer the fruit sits, the further enzymatic breakdown of the fat goes – and that is exactly what free acidity measures. A low acidity figure is therefore not a measure of flavour but an indication that healthy fruit was processed quickly.
What “cold pressed” and “first pressing” actually mean
Both terms are regulated, and both say less than the packaging suggests:
- “Cold pressed” or “cold extracted” may only be used if extraction took place below 27 °C. In a modern mill that is the norm, not a distinction.
- “First pressing” is permitted only for oils genuinely obtained by pressing. Almost every mill now works with decanter centrifuges, where there is no second pressing at all. The phrase is largely a relic.
Neither replaces the category. A cold-pressed oil can still fail the sensory test.
What you can actually read on the shelf
- Harvest year. Voluntary, but the single most useful date there is. Where it is missing, only the best-before date remains – usually 18 to 24 months after bottling, so a rough indication when counted backwards.
- Packaging. Dark glass, tin and bag-in-box protect against light; clear glass and PET do not. Why this matters so much is covered in dark glass instead of plastic.
- Origin. Virgin oils must declare an origin – either a country or a formula such as “blend of olive oils of European Union origin”. The blend formula means the oil may come from several countries.
- PDO and PGI. Protected designations tie an oil to a region and to specific varieties. One example is Aceite Valle del Tiétar.
- Price per litre. 500 ml and 750 ml bottles side by side make comparison hard. The per-litre price is on the shelf label.
Bitter and pungent are good signs
A fresh extra virgin olive oil tastes fruity, often grassy or of green tomato, then bitter, and it catches slightly at the back of the throat. That pungency comes from oleocanthal, the bitterness from breakdown products of oleuropein – both polyphenols. Read them as faults and you filter out exactly the oils that contain most of them. What these substances are is covered in polyphenols and antioxidants in olive oil.
Variety shapes the profile strongly: Picual is robust and stable, Arbequina mild and almondy. For the wider picture, see olive varieties in Europe.
Why the category alone is not enough
Extra virgin is a minimum requirement, not a quality seal. The category is determined at bottling, but the oil then sits in a warehouse and on a shelf for months, while light and heat keep working on it. Swiss and European consumer tests therefore regularly find oils that no longer pass the sensory test although the label says extra virgin. The Swiss results are in the 2026 Swiss olive oil test, and the supermarket own brands in the private-label test from Spain and France.
At home the rest is up to you: how to store olive oil explains how to keep the quality you paid for.
Frequently asked questions
Is “cold pressed” better than “extra virgin”?
No, the two answer different questions. Extra virgin is the category with limits and a panel test; cold pressed only describes that extraction stayed below 27 °C. An oil can be cold pressed and still fail the sensory test.
Does low acidity mean better flavour?
Not directly. Free acidity cannot be tasted; it indicates how healthy the fruit was and how quickly it was processed. An oil at 0.2% can taste dull, one at 0.5% excellent.
Does extra virgin olive oil stay extra virgin forever?
No. The classification applies at the moment of testing. Peroxide value and UV figures rise over time, fruitiness fades, and eventually the same oil would fail. Light and heat speed this up considerably.
Is expensive oil automatically better?
No, but very cheap oil is rarely good. Harvesting, fast processing and decent packaging all cost money. Below a certain price per litre the arithmetic for a genuine extra virgin oil does not work – which does not mean every expensive bottle is worth it.
Can you fry with extra virgin olive oil?
Yes. The smoke point sits roughly between 180 and 210 °C depending on the oil, and the polyphenols act as oxidation protection when heated. For very high temperatures over a long time it is still not the first choice – and it is a waste of the aroma.
Sources
- Regulation (EU) No 1308/2013, Annex VII Part VIII: descriptions and definitions of olive oil.
- Commission Implementing Regulation (EU) 2022/2105 on conformity checks and methods of analysis for olive oil; together with Delegated Regulation (EU) 2022/2104 it replaced the repealed Regulation (EEC) No 2568/91.
- Commission Delegated Regulation (EU) 2022/2104 on marketing standards for olive oil.
- International Olive Council (IOC), Trade Standard Applying to Olive Oils and Olive Pomace Oils, COI/T.15/NC.
