How to Choose the Best Olive Oil: A Complete Guide
Buying extra virgin olive oil seems simple — but the difference between a €4 supermarket bottle and a certified premium olive oil for €25 is enormous. In this article, we explain exactly what to look for, what measurable quality parameters there are, and why these figures truly matter for your health.
1. What exactly does ‘extra virgin’ mean?
The term extra virgin olive oil is a legally protected quality category. According to EU Regulation No. 1348/2013, extra virgin olive oil must meet three minimum criteria:
- Free fatty acid content (acidity): maximum 0.8% oleic acid
- Peroxide value: maximum 20 mEq O₂/kg
- Organoleptic: no defects, presence of fruitiness
Important: these EU thresholds are minimum requirements. True premium olive oil has an acidity of <0.3% — and the best olive oils in the world are below 0.1%. For example, our Oro Bailén Picual has an acidity of just 0.08%.
2. Polyphenol content: the most important quality parameter
Polyphenols are the bioactive antioxidants responsible for most of olive oil's health benefits. The EU recognizes this: EU Regulation 432/2012 allows an official health claim for olive oil with at least 250 mg of polyphenols per kilogram.
| Category | Polyphenols (mg/kg) | Qualification |
|---|---|---|
| Supermarket olive oil | 50 – 150 mg/kg | No EU health claim |
| Quality EVOO | 250 – 400 mg/kg | EU health claim permitted |
| Premium EVOO | 400 – 700 mg/kg | High polyphenol content |
| Exceptional EVOO | >700 mg/kg | Exceptional, early harvest |
The polyphenol content is measurable via HPLC analysis (High Performance Liquid Chromatography) — a laboratory test that determines the exact composition of polyphenols in olive oil. For serious producers, this certificate is available with every batch.
3. HPLC certification: proof that the claims are true
An HPLC report is the only objective evidence for the polyphenol values claimed by a producer. The report shows, among other things:
- Oleocanthal (mg/kg) — the compound with ibuprofen-like anti-inflammatory effects
- Oleuropein (mg/kg) — the most common polyphenol in young olive oil
- Hydroxytyrosol (mg/kg) — powerful antioxidant, the basis for the EU health claim
- Total polyphenols (mg/kg)
At olijfoliemarkt.nl, we request HPLC reports from all our suppliers. Feel free to ask us for the figures of a specific product.
4. Harvest date and freshness
Olive oil is not a product that lasts for years without loss of quality. Polyphenols degrade over time — even in a sealed bottle. Rules of thumb:
- Early harvest (October – November): maximum polyphenol content, more bitterness and pungency
- Late harvest (December – January): riper olives, milder taste, lower polyphenol content
- Consumption: preferably within 12–18 months after harvest
- Shelf life after opening: maximum 2–3 months, store in a dark, cool place
Pay attention to the harvest date on the label — not just the best-before date. Fresh olive oil smells grassy, peppery, and has a slightly bitter finish. These are signs of high polyphenol concentration.
5. Origin and variety
The olive variety and production area determine the flavor profile and polyphenol potential:
- Picual (Spain, Andalusia): Naturally high polyphenol content, stable when heated, robust flavor. Our Oro Bailén Picual is a multi-award winning EVOO from Jaén.
- Coratina (Italy, Puglia): Distinct bitter and pungent taste, high oleocanthal content.
- Koroneiki (Greece, Crete): Small olive with concentrated polyphenols, fruity finish.
- Arbequina (Spain, Catalonia): Milder flavor profile, lower polyphenol content, ideal for mild applications.
- Gemlik (Turkey): Characteristically fruity, easily accessible as an entry-level oil.
6. Quality marks and awards as a signal of quality
International competitions blind-test olive oil for taste and quality. The most authoritative ones are:
- EVOOLEUM Top 100 — global ranking of the best EVOOs
- Mario Solinas Award (IOC) — the ‘Oscar’ of the olive oil industry
- Terraolivo / NYIOOC — leading international competitions
At olijfoliemarkt.nl, we exclusively select olive oils that have won awards in at least one of these competitions or are in the top 100.
7. Checklist: how to choose the best olive oil
- ✅ Label states extra virgin olive oil (not just ‘olive oil’)
- ✅ Acidity under 0.5% (preferably <0.3%)
- ✅ Polyphenols ≥250 mg/kg, preferably 400+ mg/kg
- ✅ Harvest date mentioned (not just best-before date)
- ✅ HPLC report available upon request
- ✅ Dark or tin packaging (protects against UV degradation)
- ✅ Origin and variety clearly stated
- ✅ International quality marks or awards
At olijfoliemarkt.nl, all our olive oils meet this checklist. Questions about a specific product or want to see the HPLC figures? Contact us — we are happy to help you make the right choice.
This article was written by Hakan Uzunkaya, Olive Oil Sommelier and founder of Olijfoliemarkt.nl. Hakan personally selects each product based on HPLC-certified polyphenol values, acidity, and flavor profile.