High-Polyphenol Olive Oil, Hydroxytyrosol & the EU Health Claim – Guide
Not all olive oils are created equal. There can be a tenfold or greater difference in polyphenol content between supermarket olive oil and a high-polyphenol premium oil – especially in the levels of hydroxytyrosol, tyrosol, and oleocanthal. This guide from Cellavent explains what olive oil polyphenols are, what the approved EU health claim states, how to recognize high-polyphenol olive oil, and how Cellavent's O'Liv PLUS fits into this classification.
Table of Contents
- What are Olive Oil Polyphenols?
- Hydroxytyrosol – The Naming Polyphenol
- The Approved EU Health Claim
- Olive Oil Categories: Virgin, Extra Virgin, High-Polyphenol
- Varieties, Harvest Time, and Cultivation
- What is High-Polyphenol Olive Oil?
- O'Liv PLUS – The Cellavent Version
- Application & Dosage
- Storage & Shelf Life
- Frequently Asked Questions (FAQ)
- Sources
What are Olive Oil Polyphenols?
Polyphenols are a large group of secondary plant compounds found in many plant-based foods. In olive oil, they are responsible for the characteristic slightly bitter-peppery taste. The most important representatives are:
- Hydroxytyrosol – a simple phenolic alcohol, giving its name to the EU health claim.
- Tyrosol – chemically similar, often mentioned together with hydroxytyrosol.
- Oleuropein – a secoiridoid that is partially broken down into hydroxytyrosol during olive maturation.
- Oleocanthal – responsible for the peppery burning sensation in the throat when tasting particularly fresh olive oils.
- Lignans and other phenolic compounds.
The concentration of these substances depends on the olive variety, harvest time, processing, and storage. It is usually given as the total polyphenol content in mg per kg of oil.
Hydroxytyrosol – The Naming Polyphenol
Hydroxytyrosol (chemically: 3,4-dihydroxyphenylethanol) is one of the most prominent compounds from the olive's polyphenol spectrum. In virgin olive oil, it is partly free and partly present as a bound form in secoiridoids like oleuropein. During the maturation of the olive and the storage of the oil, bound forms are slowly broken down into free hydroxytyrosol. In the EU health claim, the substance group "hydroxytyrosol and its derivatives" is summarized.
Tyrosol is the closely related compound without the second hydroxyl group. Both substances are present in comparatively high concentrations in early harvested olive oils and decrease with increasing storage time and oxygen exposure – which is why the freshness of an olive oil is crucial for its polyphenol content.
The Approved EU Health Claim for Olive Oil Polyphenols
Unlike many other plant compounds, there is an approved health claim for olive oil polyphenols according to Regulation (EC) 432/2012:
"Olive oil polyphenols contribute to the protection of blood lipids from oxidative stress."
Prerequisite: Daily intake of 5 mg of hydroxytyrosol and its derivatives (e.g., oleuropein complex and tyrosol) per 20 g of olive oil. The claim may only be used if this threshold is reached in the consumed product.
The claim is narrowly formulated: it refers exclusively to the protection of blood lipids from oxidative stress. Other statements about the health effects of olive oil or polyphenols are not permitted in EU food advertising.
Olive Oil Categories: Virgin, Extra Virgin, High-Polyphenol
Olive oil is classified in the EU according to several criteria. Three categories are particularly relevant:
- Extra Virgin Olive Oil – highest quality level according to EU regulation. Acidity < 0.8 g/100 g, mechanically (cold-)pressed, sensorially flawless.
- Virgin Olive Oil – acidity < 2 g/100 g, also mechanically extracted.
- Olive Oil (refined) – from refined oil plus added virgin olive oil.
However, the categorization says nothing about the polyphenol content. "Extra virgin" is a quality marker for acidity and sensory properties – not for polyphenol concentration. An extra virgin olive oil can have 50 mg/kg of polyphenols or 800 mg/kg.
The EU regulation does not define a separate "high-polyphenol" category. Manufacturers who use this term usually refer to the EU health claim threshold (≥ 250 mg/kg of hydroxytyrosol derivatives, which reaches the 5 mg threshold with 20 g daily consumption).
Varieties, Harvest Time, and Cultivation
Three factors most strongly influence the polyphenol content of an olive oil:
- Olive Variety: Varieties such as Koroneiki, Picual, Coratina, or Hojiblanca are known for high polyphenol values.
- Harvest Time: Early harvests (October/November, when the olives are still green) yield significantly more polyphenol-rich oils than late harvests (December/January with ripe, black olives). However, early harvests have a lower juice yield, which contributes to their premium character.
- Processing: Cold pressing with low temperatures (< 27 °C) preserves the heat-sensitive polyphenols. Long storage in air and light degrades them.
What is High-Polyphenol Olive Oil?
There is no universally accepted threshold definition, but the following rules of thumb are emerging in the market:
| Category | Polyphenol Content | EU Health Claim Achievable? |
|---|---|---|
| Supermarket Olive Oil (Standard) | ~ 50–150 mg/kg | no |
| High-Quality Extra Virgin Olive Oil | ~ 200–400 mg/kg | only partially (threshold ~ 250 mg/kg) |
| Premium / High-Polyphenol | ≥ 500 mg/kg | yes |
| Ultra High Phenolic (e.g., O'Liv PLUS) | ≥ 950 mg/kg | yes |
Those who want to use the EU health claim must consume at least 5 mg of hydroxytyrosol and derivatives with a daily intake of 20 g (about 2 tablespoons). With an oil containing 250 mg/kg, this is exactly met; with an oil containing 950 mg/kg, the threshold is already reached with approx. 5 g of oil.
O'Liv PLUS – The Cellavent Version
O'Liv PLUS is an organic olive oil with ≥ 950 mg/kg hydroxytyrosol, tyrosol, and their derivatives (measured according to IOC method COI/T.20/Doc. No 29). It is:
- cold-pressed from early harvested olives
- from certified organic cultivation
- vegan, allergen-free, additive-free
- Made in Germany (bottling; olive origin EU)
- available in three sizes: 500 ml, 1,000 ml, and 1,500 ml
O'Liv PLUS
High-polyphenol organic olive oil with ≥ 950 mg/kg hydroxytyrosol & tyrosol. Daily routine: 10 ml neat or over cold dishes.
Application & Dosage
10 ml of O'Liv PLUS per day is recommended – neat or over cold dishes (salad, bread, soup after serving, quark, hummus). Important: Do not heat strongly. Polyphenols and the aroma profile are heat-sensitive; O'Liv PLUS is not intended for frying or deep-frying – refined or cheaper virgin olive oils are suitable for this.
Storage & Shelf Life
Polyphenols and aromas are sensitive to oxygen, light, and heat. This leads to four practical rules:
- Store the bottle in a cool, dark place (pantry, not in direct sunlight)
- Use within approximately 3 months after opening
- Seal the bottle immediately after each use
- Olive oil does not freeze – storing it in the refrigerator can lead to cloudiness, but is not critical
Frequently Asked Questions (FAQ)
What is hydroxytyrosol?
Hydroxytyrosol (3,4-dihydroxyphenylethanol) is one of the most important polyphenols in olive oil. It is partly free, partly bound in secoiridoids such as oleuropein. The EU health claim summarizes the group of substances "hydroxytyrosol and derivatives."
What is the difference between hydroxytyrosol and oleuropein?
Oleuropein is a secoiridoid, hydroxytyrosol is a simple phenolic alcohol. During ripening and processing, oleuropein is partially broken down into hydroxytyrosol. Both are summarized as "hydroxytyrosol and derivatives" in the EU health claim.
How do I recognize high-polyphenol olive oil in the supermarket?
It's difficult. The polyphenol content is rarely on the label because there is no mandatory EU declaration. High-polyphenol oils are usually sold in the premium segment and carry the EU health claim on the packaging.
Can I cook with high-polyphenol olive oil?
Gentle use in lukewarm dishes is possible. Strong heating, frying, or deep-frying degrades polyphenols and aromas. For the daily routine in the context of the health claim, cold consumption is recommended.
Why does high-polyphenol olive oil taste bitter and pungent?
Bitterness (oleuropein) and pungency in the throat (oleocanthal) are markers for high polyphenol content. They are desirable and quality characteristics, not a defect.
What exactly is the EU health claim?
"Olive oil polyphenols contribute to the protection of blood lipids from oxidative stress." Condition: 5 mg of hydroxytyrosol and derivatives per 20 g of olive oil per day.
What is the best olive oil in the world?
There is no general "best" answer. For the criterion of polyphenol content, early harvested premium oils from polyphenol-rich varieties (Koroneiki, Picual, Coratina) stand out. An objectively measurable value is the mg/kg content according to the IOC method.
When were the olives for O'Liv PLUS harvested?
O'Liv PLUS uses early harvested olives from the main season (October/November). Early harvests result in higher polyphenol concentrations.
Which olive varieties are used?
O'Liv PLUS is based on polyphenol-rich Mediterranean varieties. The exact blend of varieties may vary depending on the batch; it is selected to meet the polyphenol specification.
How do I store O'Liv PLUS after opening?
Cool, dark, tightly sealed. Consume within approximately 3 months after opening to best preserve aroma and polyphenol profile.
Is O'Liv PLUS organic?
Yes, O'Liv PLUS is a certified organic olive oil. Cultivation is carried out according to the EU organic regulation, without synthetic pesticides and mineral fertilizers.
Is O'Liv PLUS suitable during pregnancy and breastfeeding?
Olive oil is a food and a component of the Mediterranean diet. As part of a balanced diet, olive oil is also suitable for pregnant and breastfeeding women. For specific questions, we recommend consulting a midwife or gynecologist.
Sources
- Commission Regulation (EU) No 432/2012 – List of permitted health claims made on foods. eur-lex.europa.eu
- EFSA – Scientific Opinion on the substantiation of health claims related to polyphenols in olive (2011). efsa.europa.eu
- International Olive Council (IOC) – Method for the determination of the phenolic fraction (COI/T.20/Doc. No 29). internationaloliveoil.org
- PubMed – Research database on "olive oil polyphenols". pubmed.ncbi.nlm.nih.gov