Extra virgin olive oil is one of the most-studied foods in the world
But only fresh, green-harvested, polyphenol-rich oil delivers the effects you read about. Here's exactly why — and what it does inside your body.
Green-harvested olives. This is where the health benefits come from.
When most people think of olives, they picture small black fruits — plump, ripe, ready to eat. That's also the kind most of the world's olive oil is made from, because ripe olives yield more oil per kilo and mean higher profits for industrial producers.
But every health study that made olive oil famous was really a study of polyphenols. And polyphenols are at their highest when the olive is still green on the tree — weeks before it ripens.
As the fruit ripens from green to purple to black, two things happen in parallel: the oil content goes up, and the polyphenol content drops off a cliff. Mid-season oil might contain half the antioxidants of early-harvest oil. Late-season oil from fully black olives can be almost devoid of the compounds that matter.
We harvest at the beginning of the window, when the grove still looks green from a distance. We take less oil per tree — which is why our production is small — and we get dramatically more polyphenols per drop. That's the oil you're buying.
The polyphenols, one by one
"Polyphenol" is an umbrella term for a family of plant antioxidants. In olive oil, four matter the most:
Oleocanthal — the "natural ibuprofen"
Discovered in 2005 when Philadelphia researchers noticed that the peppery sting at the back of their throats from fresh olive oil felt almost identical to the sting of liquid ibuprofen. They ran the chemistry and published in Nature: oleocanthal inhibits the same COX-1 and COX-2 enzymes as ibuprofen, at the same magnitude gram-for-gram. It's why low-grade chronic inflammation is reduced in people who eat fresh EVOO daily — and why researchers are now testing it as a candidate for slowing Alzheimer's and certain cancers.
Oleocanthal only exists in fresh, early-harvest oil. Heat-extracted or aged oil has none.
Oleacein — the cardiovascular powerhouse
A close cousin of oleocanthal, oleacein has been linked in clinical studies to improved arterial elasticity, lower blood pressure, and reduced LDL oxidation. Oxidised LDL is the specific form of cholesterol that sticks to artery walls and starts atherosclerosis — so preventing LDL oxidation is central to cardiovascular protection.
Hydroxytyrosol — the master antioxidant
The most potent natural antioxidant ever isolated from a food. The European Food Safety Authority (EFSA) only allows olive oil to carry the official "protects LDL from oxidation" health claim when its hydroxytyrosol + derivatives exceed 5 mg per 20 g serving — which translates to a minimum of ~250 mg/kg total polyphenols. The average supermarket oil doesn't qualify. Our 2026 harvest tests above 400 mg/kg.
Tyrosol
Works synergistically with hydroxytyrosol to neutralise free radicals. Tyrosol also crosses the blood-brain barrier and has shown neuroprotective effects in animal studies.
What these compounds do inside you
This is not wellness folklore. These are outcomes from peer-reviewed, randomised controlled trials and large prospective cohort studies.
🫀 Heart disease & stroke
The PREDIMED trial (New England Journal of Medicine, 2013; re-published 2018) followed ~7,400 adults at high cardiovascular risk for five years. The group assigned to a Mediterranean diet with added extra virgin olive oil had a 30% reduction in major cardiovascular events — heart attack, stroke, cardiovascular death — compared to a low-fat control diet.
Mechanism: polyphenols prevent LDL oxidation, reduce inflammation in the vessel wall, improve endothelial function, and modestly lower blood pressure.
🧠 Alzheimer's & cognitive decline
Mediterranean populations consistently show lower rates of Alzheimer's and dementia. Lab studies at Temple University and Monell Chemical Senses Centre have shown oleocanthal helps clear amyloid-β plaques — the sticky protein deposits that define Alzheimer's pathology — from the brain in animal models. Human trials are ongoing. The cohort evidence already shows a signal: in the PREDIMED-NAVARRA sub-study, participants on EVOO scored significantly better on cognitive tests five years in than the control group.
🔥 Chronic inflammation
Low-grade chronic inflammation underlies almost every Western disease — heart disease, type-2 diabetes, autoimmune conditions, some cancers. Fresh EVOO consumption has been shown to reduce markers like C-reactive protein (CRP), interleukin-6 and TNF-α in randomised trials. A tablespoon or two a day, long-term, is genuinely anti-inflammatory at the systemic level.
🩸 Type-2 diabetes & metabolic health
PREDIMED participants on the EVOO diet had a 40% lower incidence of type-2 diabetes over the trial. EVOO improves insulin sensitivity, slows carbohydrate absorption, and feeds beneficial gut bacteria that regulate glucose metabolism.
🦠 Gut microbiome
Polyphenols are prebiotic — they nourish beneficial gut bacteria (Akkermansia, Bifidobacterium) while suppressing pathogens. A healthy gut lining lowers systemic inflammation and improves immunity.
🌡️ Cancer risk markers
In vitro research shows oleocanthal triggers a specific lysosomal cell-death pathway in cancer cells while leaving healthy cells unharmed. Epidemiological studies report lower rates of breast, colorectal and digestive-tract cancers in high-EVOO populations. Cause-and-effect isn't proven in humans yet, but the mechanism and population data point in the same direction.
How to actually use it day-to-day
To get the benefit, you need to consume it. Aim for around 2 to 4 tablespoons of fresh EVOO daily — the intake level across most of the positive studies.
Raw is best
Heat degrades polyphenols. Drizzle on salads, soups, bread, roasted vegetables, hummus, yogurt, eggs, pasta after the heat is off. This is where most of the benefit lives.
But cooking is fine too
Fresh EVOO has a smoke point around 190–210°C — plenty for sautéing, roasting, baking. You lose some polyphenols to heat but keep the monounsaturated fats. Use it for everything.
A spoon on an empty stomach
A popular Mediterranean habit: a tablespoon first thing in the morning. Some people report better digestion and steadier appetite. The science is thin but the tradition is ancient.
Store in the dark
Light is the enemy. Our dark glass bottles protect the polyphenols on your counter; the 3L tin blocks light completely for longer-term storage in the cupboard.