High Polyphenol Olive Oil in Canada: What the Numbers Mean

If you've searched for a high polyphenol olive oil in Canada, you've probably noticed that most bottles don't tell you the number. "High in polyphenols" is easy to print on a label; publishing a lab result is not. This page explains what polyphenols are, what a good number looks like, and what our own oil tested at — with the report attached.

What polyphenols are, in one paragraph

Polyphenols are a family of natural compounds in the olive fruit that survive into the oil only when it is extra virgin — pressed from fresh olives without heat, solvents or refining. The main ones in olive oil are hydroxytyrosol, tyrosol, oleuropein and oleocanthal. They are antioxidants: they protect the oil itself from going rancid, and they are the part of olive oil that most of the health research focuses on. They are also what you taste. The bitterness on the tongue and the peppery catch at the back of the throat in a fresh, robust oil are polyphenols. A completely smooth, flat oil is usually a low-polyphenol oil.

What counts as "high"

Polyphenol content is measured in milligrams per kilogram of oil (mg/kg), usually by HPLC using the International Olive Council method (COI/T.20/Doc. 29). As a rough guide:

• Under 100 mg/kg — typical of many supermarket extra virgin oils, especially blends and older harvests.
• 100–250 mg/kg — a decent everyday extra virgin.
• 250 mg/kg and above — the threshold the European Food Safety Authority set for an olive oil to carry a polyphenol health claim (at least 5 mg of hydroxytyrosol and its derivatives per 20 g of oil).
• 500 mg/kg and above — very high; usually early-harvest oils from specific varieties, noticeably bitter and pungent.

Two things move the number more than anything else: how early the olives are picked (greener olives carry more polyphenols, at the cost of yield), and how fresh the oil is when you open it. Polyphenols decline steadily with time, light and heat, so a "high polyphenol" oil bottled 18 months ago in clear glass may no longer be one.

What Golden Spoon tested at

An independent HPLC analysis by Total Testing Service (report 2601084, issued 28 January 2026) measured 260 mg/kg of total biophenols in our extra virgin olive oil — above the 250 mg/kg reference threshold. The same oil was tested by SGS Tunisia, an IOC-recognised laboratory, with free acidity of 0.18% (limit 0.80%) and a peroxide value of 8.8 meq O₂/kg (limit 20), both signs of a fresh, carefully handled oil. Both reports are published in full on our lab analysis and certificates page.

We publish the numbers rather than the adjectives because the numbers are what you can compare. If another brand tells you its oil is high in polyphenols, ask for the mg/kg and the date of the test.

Why Tunisian oil

Tunisia is one of the world's largest olive oil producers and the largest outside the European Union, yet most of its oil has historically been exported in bulk and bottled under Italian and Spanish labels. That is changing: Tunisian producers now win dozens of awards every year at the NYIOOC World Olive Oil Competition in New York. The hot, dry climate of the Sfax region, where our oil comes from, stresses the trees in a way that favours polyphenol production, and the Chemlali olive that dominates the area gives a fruity oil with a clean peppery finish. Read more in our guide to Tunisian olive oil.

Which of our oils to choose

Our certified organic extra virgin olive oil is the robust, high-polyphenol style — fruity, slightly bitter, with a peppery finish — and comes in 500 ml, 1 L and a 3 L tin. If you prefer a milder taste for everyday cooking, our Naturally Smooth oil is gentler on the palate (and is conventionally grown, not certified organic). The Organic + Smooth bundle lets you compare the two side by side. All of our oils are cold-pressed in Tunisia and ship from Ottawa across Canada.

How to keep the polyphenols you paid for

1. Buy in dark glass or a tin, and buy a size you'll finish within two to three months of opening.
2. Store it cool and dark — a cupboard, never beside the stove or on a sunny counter — with the cap tightly closed.
3. Use it raw as well as for cooking. Extra virgin olive oil is stable for sautéing and roasting, but drizzling it on finished food is where you get the most polyphenols and the most flavour.
4. Trust bitterness and pepper. They are signs of polyphenols, not defects.

Frequently asked questions

Is 260 mg/kg a lot?

It is above the 250 mg/kg threshold used for an EU polyphenol claim and well above what most supermarket oils would test at. It is not the highest number on the market — some early-harvest specialty oils exceed 500 mg/kg — but those are typically very bitter and sold in small bottles at a premium. 260 mg/kg is a robust oil you can still use every day.

Is high polyphenol olive oil good for cooking?

Yes. The smoke point of extra virgin olive oil is well above normal sautéing and roasting temperatures, and polyphenols actually make the oil more stable under heat. You lose some of them in cooking, which is why we also suggest using the oil raw.

Does organic mean more polyphenols?

Not by itself. Organic certification is about how the olives are grown, not about the oil's chemistry. Polyphenol content depends on variety, harvest timing, milling and freshness. Our organic oil happens to be our robust, higher-polyphenol style; our Naturally Smooth oil is milder.

Do you ship across Canada?

Yes, from Ottawa to every province; see our shipping policy for rates and delivery times.

Information on this page is provided for general interest and is not medical advice. See our terms of service.