Polyphenols: The Hidden Treasure of Olive Oil

What are polyphenols and why do they matter?

If you're someone who looks for a genuinely great EVOO — one with body, character and depth — there's something you need to know about: polyphenols.

In 2003, the Spanish Government funded the largest clinical nutrition trial in European history.

It was called PREDIMED.

It involved 7,447 people at high cardiovascular risk.

A team of more than 300 doctors and researchers worked across 11 centres throughout Spain.

The goal was simple but ambitious:

To find out whether the Mediterranean diet, with olive oil at its heart, could prevent heart attacks, strokes and cardiovascular death.

The study was designed to run for longer.

But it had to be stopped early.

Not because something went wrong.

But because the results were so clear that the ethics committee concluded it would be unfair to withhold access to the group that was showing such benefit.

The group following a Mediterranean diet with Extra Virgin Olive Oil reduced their risk of heart attack, stroke or cardiovascular death by 30% compared to the control group.

Source: New England Journal of Medicine, 2018 (PREDIMED Study Investigators)

Yes, you read that right.

30%.

This isn't a wellness headline.

It's the result of 4.8 years of follow-up with 7,447 participants, published in the world's most prestigious medical journal.

But there's something that study doesn't tell you directly.

Something that should completely change the way you choose your olive oil.

Why "Extra Virgin" alone isn't enough

The oil used in the PREDIMED study was not just any olive oil.

It was an EVOO specifically selected for its high polyphenol content.

So what are polyphenols?

They are the bioactive compounds in the olive with the strongest scientific backing:

• They reduce markers of chronic inflammation linked to cardiovascular and metabolic disease (see PMC study on anti-inflammatory properties)
• They protect cells from oxidative stress, one of the primary mechanisms behind cellular ageing (see OLIVAUS clinical trial)
• They support cardiovascular health by reducing oxidised LDL, improving HDL and helping regulate blood pressure (see systematic review on EVOO and cardiovascular health)
• They enhance cognitive function by supporting memory and protecting against neurodegenerative decline (see study on polyphenols and neuroprotection)
• They optimise mitochondrial function by improving cellular energy metabolism (see review on polyphenols and mitochondria)

But for any of this to have a real effect, you need the right concentration.

And here is the problem.

The great "Extra Virgin" myth

Two oils can both be legally labelled "Extra Virgin" and have completely different polyphenol concentrations.

It's like comparing a 10mg vitamin C supplement with a 1,000mg one.

Technically, both "contain vitamin C".

But only one has a real effect on your body.

The same applies to olive oil and polyphenols.

European regulation requires a maximum acidity of 0.8º to qualify as Extra Virgin.

It says nothing about minimum polyphenol levels.

And polyphenols are lost in four ways that large-scale production simply cannot avoid:

1. Polyphenols degrade over time — light, heat and oxygen all destroy them
2. Most oils are harvested late — ripe olives contain far fewer polyphenols than green ones
3. They are filtered to make the oil "smoother" — stripping out the active phenolic compounds
4. Months pass in the distribution chain — by the time the oil reaches you, the most fragile compounds have already degraded

The label doesn't tell you how many polyphenols are in the oil you're buying.

If that figure doesn't appear, you have no way of knowing.

The protocol backed by European science

You don't need to spend a fortune.

The EFSA — European Food Safety Authority — approved an official health claim in 2011:

"Olive oil polyphenols contribute to the protection of blood lipids from oxidative stress."

Source: EU Regulation No 432/2012 — Official Journal of the European Union

That claim can only be used on oils exceeding 250 PPM (250 mg/kg) of polyphenols.

And the documented beneficial effect is achieved with 20g per day of that oil.

20g.

Two tablespoons.

A salad dressing.

A drizzle on toast.

What many of our customers take straight on an empty stomach every morning.

The difference isn't how much you consume.

It's which oil you use.

👉 See Arraigo Unfiltered

How to get an EVOO with polyphenols that actually count

You don't need to import oil from anywhere.

You don't need to pay extravagant prices.

Our Arraigo Unfiltered contains over 570 mg/kg of polyphenols.

More than double the threshold recognised by the EFSA.

Why does it have such a high concentration?

1. Early harvest — green olives contain a higher concentration of polyphenols than ripe ones
2. Unfiltered — all the active phenolic compounds are preserved
3. No blending — it comes entirely from the same olive grove, not a blend of oils like most of what you'll find on the market
4. Bottled immediately — it doesn't spend months in logistics centres losing its most fragile compounds

These figures are not marketing.

They are certified laboratory analysis results for Season 2025/26, published batch by batch.

The real data behind each oil

Oil	Polyphenols	Acidity
Prima Mensa ↗	700 mg/kg	0.20º
Estirpe Picual Unfiltered ↗	665 mg/kg	0.13º
Arraigo Unfiltered ↗	570 mg/kg	0.21º
Early Harvest ↗	380 mg/kg	0.18º

Certified laboratory analysis · Season 2025/26 · Data published per batch

The EFSA threshold is 250 mg/kg.

Our lowest-polyphenol oil exceeds it by more than 50%.

Our highest comes in at nearly three times that figure.

How to store an EVOO of this quality

Polyphenols are fragile.

Light degrades them. Heat degrades them. Oxygen degrades them.

Every time you open the bottle, air gets in.

That's why, if you're not yet a Mi Oliva Gourmet customer, we'd like to give you a completely opaque oil dispenser with a system that keeps air out.

To get yours, add the Dispenser from the Shop and use the following code at checkout:

ACEITERA-GRATIS

When you order your Arraigo Unfiltered, our exclusive patented oil dispenser (€29) is yours FREE

👉 Order your Arraigo Unfiltered (FREE Dispenser)

Need more reasons?

Here's what people who are already using it have to say:

⭐⭐⭐⭐⭐ — Asunción M.

"A very, very good oil that doesn't go unnoticed. I use it on toast and salads, and it opens up a whole world of real olive flavour — the oil of before, the oil that's always been there. Nothing like what you find in supermarkets. And it's so important to support small producers so they can survive."

⭐⭐⭐⭐⭐ — Simo L.

"Exquisite, as always. I tried this oil a few years back and we loved it. I've had both the filtered and unfiltered versions — the unfiltered is my preference — but both are exceptional. The flavours and aromas that open up on the palate and in the throat are something else. I'll keep coming back to this oil whenever I can."

⭐⭐⭐⭐⭐ — Juan Antonio R.

"UNBEATABLE. The best olive oil I've ever tried, and I've tried quite a few. It's a genuine delight for the nose and the palate — in a word, UNBEATABLE. Please never stop making this wonderful juice. Thank you."

⭐⭐⭐⭐⭐ — Ángela Rosa Z.

"An oil of outstanding quality and unrivalled flavour. It's the first time we've tried it at home, and we're absolutely delighted — all its organoleptic qualities come together to make it something genuinely special and unique. Our most sincere congratulations, and best wishes for health and success to everyone there."

Two options:

❌ Option 1 Keep buying the same oil you always have, with no idea how many polyphenols it contains — because the label doesn't say. It might be a good oil. It might not. Without the analysis, there's no way to know.

✅ Option 2 Invest less than €0.50 a day in an oil whose numbers you know exactly: certified laboratory analysis, Season 2025/26, with over 570 mg/kg of polyphenols. More than double the threshold recognised by the EFSA.

Your call.

Try Arraigo Unfiltered (FREE Dispenser with your first order)

P.S. If for any reason you're not happy, we'll refund you in full. No questions asked. That's how confident we are that you're going to have an experience like no other.

P.P.S. The largest clinical nutrition trial in European history was stopped early because the results were too clear to ignore. You can use the same type of oil they used in that study for less than €0.50 a day. Think how fortunate we are to have it so close to home.