What ‘Polyphenol Count’ Numbers Mean
Fancy oils increasingly print a polyphenol count — a number like ‘450 mg/kg’. It looks like marketing, but it points at something real: flavour, keeping quality, and one strictly-defined health claim. Here is how to read it without being dazzled.
The figure measures the concentration of polyphenols — the antioxidant compounds responsible for an oil’s bitterness and peppery pungency, and for much of its stability. As a rough guide: under about 250 mg/kg is mild, 250–500 is robust, and above about 500 is intensely peppery. There is no single legally-mandated method printed on every bottle, so numbers are not perfectly comparable brand to brand, but the broad bands hold. Treat the count as a flavour and freshness forecast, not a precise league-table score.
What the number is
Polyphenols are the olive’s natural biophenols — oleocanthal for the throat pepper, oleuropein and its relatives for the bitterness. The count adds them up as a concentration. A high figure signals a fresh, early-harvest, well-made oil, and those same compounds slow oxidation, so a high-count oil also tends to keep longer. Crucially, the number falls as the oil ages, so a printed figure is only really true near bottling. It is a clue to style and freshness, not a permanent quality stamp.
| What it measures | Total phenolic compounds (antioxidants) by concentration |
|---|---|
| Usual unit | Milligrams per kilogram (mg/kg) |
| Mild | Under ~250 mg/kg |
| Robust | ~250–500 mg/kg |
| Intensely peppery | Above ~500 mg/kg |
| EU health-claim threshold | ≥5 mg hydroxytyrosol & derivatives per 20 g (about 250 mg/kg) |
| Over time | Falls as the oil ages |
The one official health claim
The number connects to a single, tightly-worded EU-authorised claim: olive-oil polyphenols ‘contribute to the protection of blood lipids from oxidative stress’, and it may be used only for oils supplying at least 5 mg of hydroxytyrosol and its derivatives per 20 g — roughly a 250 mg/kg oil, eaten at about 20 g a day. That is a specific, measured statement about blood lipids in a lab sense, not a promise that a spoonful cures anything. This is general information, not medical advice. Higher counts do not multiply the benefit or the claim.
How much to care
- Read it as a flavour forecast : high means bold, peppery and long-keeping; moderate means gentler and food-friendly.
- It is not ‘higher is better’ — a very high count can be too bitter for delicate dishes.
- The figure is only true near bottling, so pair it with a recent harvest date.
- Pick to match your cooking, not to win a number contest.
Polyphenol counts: common questions
What is a good polyphenol count?
It depends on taste: under ~250 mg/kg is mild, 250–500 robust, above ~500 intensely peppery. Higher is not automatically better — match it to your food.
Does a high count mean a healthier oil?
Only in one narrow, official sense: oils supplying at least 5 mg of certain polyphenols per 20 g qualify for an EU claim about protecting blood lipids from oxidation. This is general information, not medical advice.
Why does the number matter for freshness?
Polyphenols are antioxidants, so a higher count generally means an oil that resists rancidity longer — and a fresher, earlier harvest to begin with.
Does the count stay the same over time?
No. It falls as the oil ages, so a printed figure is only accurate near bottling. Always check the harvest date alongside it.
Are counts comparable between brands?
Only roughly. Testing methods vary, so treat the bands (mild / robust / intense) as a guide rather than exact, brand-to-brand scores.
Treat the polyphenol count as a flavour forecast : high means bold, peppery and long-keeping; moderate means gentler and food-friendly. Pick to match your cooking, not to win a number contest — and remember a recent harvest date matters more than any single figure, because the count only falls from the day it was bottled. Where a brand prints a very high number, ask when the oil was pressed : a big count on year-old oil is a boast about a value that has already drained away.
Based on olive-oil phenolic chemistry and the EU-authorised health claim (Reg. 432/2012: ≥5 mg hydroxytyrosol and derivatives per 20 g); this is general information, not medical advice.