Polyphenols are natural compounds that affect the flavour and stability of extra-virgin olive oil. A single number is not a reliable standalone quality or health score.
What are olive-oil polyphenols?
Olive-oil polyphenols include secoiridoids, phenolic alcohols, lignans and flavonoids. Compounds such as oleocanthal and oleacein are especially interesting in extra-virgin olive oil.
The connection with taste
Bitterness and the peppery sensation in many fresh olive oils are connected to the phenolic profile. But taste is not a substitute for laboratory testing; cultivar, harvest, processing and storage also matter.
Stability and health claims
Phenolics contribute to the oil’s resistance to oxidation. A specific European Union health claim concerns hydroxytyrosol and derivatives at qualifying levels; an arbitrary “total polyphenols” number is not automatically equivalent.
The ZeytinCheck approach
When reporting a product’s polyphenol content, we should include harvest year, test date, analytical method and source wherever available. We should not derive medical claims from a single number.
These articles are informational only, not medical advice or independent laboratory verification of particular products.