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 nutritional clinical trial in European history.

It was called PREDIMED.

7,447 people at high cardiovascular risk took part.

A team of more than 300 doctors and researchers worked across 11 centers 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 of a problem.

But because the results were so clear that the ethics committee decided it would be unfair to deny all participants access to the group that was showing the best outcomes.

The group that followed 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 outcome of 4.8 years of follow-up with 7,447 people, 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 buying any "Extra Virgin" isn't enough

In the PREDIMED study, the oil used wasn't just any olive oil.

It was an EVOO selected specifically 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 aging (see OLIVAUS clinical trial)
• They support cardiovascular health by reducing oxidized LDL, improving HDL, and helping regulate blood pressure (see systematic review on EVOO and cardiovascular health)
• They support cognitive function, improving memory and offering protection against neurodegenerative decline (see study on polyphenols and neuroprotection)
• They optimize mitochondrial function, improving cellular energy metabolism (see review on polyphenols and mitochondria)

But for them to have a real effect, you need the right concentration.

And this is where the problem lies.

The great "Extra Virgin" myth

Two oils can both be legally "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 is true of olive oil and polyphenols.

European regulations require a maximum acidity of 0.8° to qualify as Extra Virgin.

They say 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 have a lower polyphenol concentration than green ones
3. They are filtered to make oils "milder" — removing the active phenolic compounds in the process
4. They spend months in the distribution chain — by the time the oil reaches your home, the most fragile compounds have already degraded

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

If that figure isn't there, you have no way of knowing.

The protocol backed by European science

You don't need to spend millions to find out.

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 may only be used on oils that exceed 250 PPM (250 mg/kg) of polyphenols.

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

20g.

Two tablespoons.

A salad dressing.

A drizzle on toast.

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

The difference isn't in how much you consume.

It's in which oil you use.

👉 See Arraigo Unfiltered

How to get an EVOO with the polyphenols that matter

You don't need to import oil from anywhere.

You don't need to pay eye-watering prices.

Our Arraigo Unfiltered contains more than 570 mg/kg of polyphenols.

More than double the threshold recognized by the EFSA.

Why is the concentration so high?

1. Harvested early — green olives have a higher polyphenol concentration than ripe ones
2. Unfiltered — all active phenolic compounds are preserved
3. No blending — it comes entirely from a single grove, not a blend of oils like most of what you find on the market
4. Bottled immediately — it doesn't spend months in logistics centers losing its most fragile compounds

This isn't marketing copy.

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

The real figures for each oil

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

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

The EFSA threshold is 250 mg/kg.

Our lowest oil exceeds it by more than 50%.

The highest is almost 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, I'd like to give you a completely opaque oil dispenser with a system that keeps air out.

To claim it, add the Oil 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 Oil Dispenser)

Need more reasons?

See what people who are already using it have to say:

⭐⭐⭐⭐⭐ — Asunción M.

"A very, very good oil that you simply can't ignore. I use it on toast and in salads, and it opens up a world full of real olive oil flavor — the kind you remember, the kind it's always been. Nothing like what you find in supermarkets. And it's important to support small producers so they can keep doing what they do."

⭐⭐⭐⭐⭐ — Simo L.

"Exquisite, as always. I first tried this oil a few years ago and loved it — I've had both the filtered and unfiltered versions (the one I prefer), but both are exceptional. The flavors and aromas that open up on your palate and at the back of your throat are remarkable. As long as I can, I'll keep coming back to this oil."

⭐⭐⭐⭐⭐ — Juan Antonio R.

"UNBEATABLE. The best oil I've ever tasted — and I've tasted quite a few. It's a genuine pleasure for both the nose and the palate. In a word: UNBEATABLE. Please never stop making this wonderful juice. Thank you."

⭐⭐⭐⭐⭐ — Ángela Rosa Z.

"An oil of excellent quality and unrivaled flavor. It's the first time we've tried it at home, and we're delighted — with all its organoleptic qualities that make it something special and truly unique. My most sincere congratulations, and best wishes for good health and continued 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 where you know the exact figure: certified laboratory analysis, Season 2025/26, with more than 570 mg/kg of polyphenols. More than double the threshold recognized by the EFSA.

Your call.

Try Arraigo Unfiltered (FREE Oil Dispenser with your first order)

PS: If for any reason you're not satisfied, we'll give you your money back. No questions asked. That's how confident we are that you're going to have an experience like no other.

PS2: The largest nutritional clinical 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.