Polyphenols are the natural antioxidant compounds that give extra virgin olive oil much of its flavour, stability and health interest. Under EU law, an olive oil can carry the authorised claim that “olive oil polyphenols contribute to the protection of blood lipids from oxidative stress” — but only if it contains at least 5 mg of hydroxytyrosol and its derivatives per 20 g of oil (Regulation (EU) 432/2012). For a brand, high-polyphenol oil is a credible, regulated way to stand out.
What polyphenols are and why they matter
- Antioxidants — hydroxytyrosol, tyrosol, oleocanthal and oleuropein derivatives.
- Taste — they create the peppery, slightly bitter notes of a fresh EVOO.
- Stability — higher polyphenols generally mean a longer shelf life.
- Regulated claim — the EU antioxidant claim is allowed above the 5 mg/20 g threshold.
What drives polyphenol content
| Factor | Effect on polyphenols |
|---|---|
| Variety | Picual and early-harvest oils are typically highest |
| Harvest timing | Earlier (green) harvest = more polyphenols |
| Extraction | Cold extraction preserves them |
| Freshness & storage | Polyphenols decline over time and with heat/light |
High-polyphenol oil as a private label positioning
If health is your angle, an early-harvest Picual can be measured and, above the legal threshold, labelled with the EU antioxidant claim — a strong, compliant differentiator for premium retail and export. We source, measure and bottle to that specification. See our olive oil sourcing, our turnkey service, and the private label guide.
How much is “high”? Reading a polyphenol analysis
The EU claim threshold, 5 mg of hydroxytyrosol and its derivatives per 20 g of oil, is the same as 250 mg/kg. There is no legal definition of a “high-polyphenol” oil beyond that. Laboratories can also report different figures: “total phenols” measured by a colourimetric method, or the individual biophenols measured by HPLC, following the International Olive Council method (COI/T.20/Doc. No 29). Only the hydroxytyrosol-and-derivatives figure counts for the claim, so check which number you are reading.
From the grove to the bottle: keeping the polyphenols
- Harvest early — green olives at the start of the campaign carry the most polyphenols, at a lower oil yield. Picual is the usual candidate, as we explain on our Picual page.
- Mill fast and cool — olives milled within hours, and “cold extraction”, a term reserved for oil obtained below 27 °C.
- Protect the oil — dark glass or tins, little headspace, cool storage: polyphenols decline with time, light and heat.
- Analyse twice — at bottling, and with a margin for the decline until the best-before date if you use the claim.
What you can and cannot say on the label
- Allowed — the authorised wording “olive oil polyphenols contribute to the protection of blood lipids from oxidative stress”, with the information that the effect comes with 20 g of olive oil a day, when the analysis meets the threshold.
- Never allowed — claims that a food prevents, treats or cures a disease.
- Check first — descriptors such as “rich in polyphenols” are not among the EU’s authorised nutrition claims: have them checked by a regulatory adviser before printing.
Frequently asked questions
Which olive oil has the most polyphenols?
Early-harvest, cold-extracted extra virgin oils from robust varieties such as Picual tend to be highest. Exact levels are confirmed by laboratory analysis.
Can I put a health claim on my label?
Only the specific EU-authorised claim, and only if the oil contains at least 5 mg hydroxytyrosol and derivatives per 20 g, verified by analysis. We help you meet and document the threshold.
Do polyphenols affect taste?
Yes — they create the peppery, bitter, “throat-catching” notes typical of a fresh, high-quality EVOO.
Can you provide polyphenol analysis?
Yes. Technical and organoleptic analyses, including polyphenol content, can be provided on request.
How many mg/kg of polyphenols counts as high?
The EU health claim requires at least 5 mg of hydroxytyrosol and its derivatives per 20 g of oil, which is 250 mg/kg. Beyond that, “high polyphenol” has no legal definition, so always ask which figure a laboratory reports.
Do polyphenols decrease over time?
Yes. They decline with time, light, heat and oxygen. An oil that meets the claim at bottling may fall below it months later, so analyse at bottling and keep a margin.
Sources: Commission Regulation (EU) No 432/2012 · Regulation (EC) No 1924/2006 on nutrition and health claims · International Olive Council, method COI/T.20/Doc. No 29 · Commission Delegated Regulation (EU) 2022/2104.
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