Olive oil polyphenols are relevant to taste, quality and documentation. They are also connected to one of the few EU-authorised health claims for olive oil: the protection of blood lipids from oxidative stress.
This is a precise statement. It does not mean olive oil treats disease. It means a permitted nutrition and health claim may be used when the oil meets clearly defined conditions.
What is oxidative stress?
Oxidative stress occurs when reactive molecules, often called free radicals, are produced faster than the body's own defence systems can neutralise them. The process is a normal part of metabolism, but an excess can contribute to oxidation of cellular structures, proteins and lipids.
In EFSA's authorised claim, blood lipids are the focus. Blood lipids are sensitive to oxidation, and it is in relation to these lipids that olive oil polyphenols have been assessed.
The authorised EFSA health claim
Under EU Regulation 432/2012, the authorised health claim for olive oil polyphenols states that olive oil polyphenols contribute to the protection of blood lipids from oxidative stress.
This is an Article 13.1 claim. It means the wording is based on a scientific assessment of a relationship between a food or substance and a physiological effect. The claim is also limited: it concerns olive oil polyphenols and the protection of blood lipids from oxidative stress, not general health or a specific disease.
Conditions for using the claim
For an olive oil to use the authorised claim, it must provide at least 5 mg of hydroxytyrosol and its derivatives, for example oleuropein complex and tyrosol, per 20 g of olive oil.
Consumer information must also state that the beneficial effect is obtained with a daily intake of 20 g of olive oil. This is a regulatory information requirement attached to the claim. It is not a medical recommendation from Vala Selection.
This is why documented analysis matters. It is not enough for an oil to be marketed as "rich in polyphenols"; the content should be traceable to batch, method and laboratory result.
What 1,004 mg/kg means
Vala Selection's reference batch 2025-VL-MIR-001 was analysed at 1,004 mg/kg total polyphenol content by HPLC at the University of Split. That is a high value in relation to the level required for the authorised health claim to be relevant.
The figure should still be understood correctly. It applies to the current batch, not to future harvests. Polyphenol content is affected by cultivar, harvest timing, weather, milling, storage and time since production. Each batch should therefore be analysed separately.
Read more about the foundation here: polyphenols in olive oil.
Hydroxytyrosol, oleuropein and oleocanthal
EFSA's condition refers to hydroxytyrosol and derivatives, including oleuropein complex and tyrosol. In practice, this relates to a broader phenolic profile in which several compounds and derivatives contribute to the oil's analytical value.
Oleuropein is closely linked to bitterness and the green phenolic character of olives. Oleocanthal is more closely linked to the peppery sensation in the throat. Together they help explain why a high-polyphenolic oil can feel more intense than a mild standard oil.
Vala Selection communicates total polyphenol content at batch level because it is the most robust and customer-readable value. Individual molecule values can be interesting, but without method and sample context they are easy to overinterpret.
What the claim does not mean
The authorised claim does not mean olive oil is a medicine, treatment or guarantee of a specific health outcome. Foods may not be marketed as cures, treatments or preventive measures for disease.
It also does not mean more is always better. Olive oil belongs in a balanced diet, and the regulatory wording is intentionally narrow: blood lipids, polyphenols and oxidative stress.
For Vala Selection, the important point is transparency. If a health claim is used, the customer should be able to see which batch it applies to, how the analysis was performed and why the oil meets the conditions.
Why handling and storage matter
Polyphenols begin to degrade after harvest, and the process is affected by time, temperature, oxygen and light. Rapid milling, careful handling and dark bottling help preserve the oil's phenolic profile.
Storage after purchase also matters. Keep the oil cool, dark and tightly closed. This protects not only the flavour, but also the compounds that make the oil analytically interesting.
Further reading
On the method behind the analysis: HPLC analysis of olive oil.
On polyphenols as a group: polyphenols in olive oil.
On bitterness and oleuropein: oleuropein in olive oil.
On pepperiness and oleocanthal: oleocanthal in olive oil.
Sources: EU Regulation 432/2012 on authorised health claims. EFSA Journal 2011;9(4):2033. HPLC analysis performed at the University of Split. Batch 2025-VL-MIR-001.
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