Extra virgin olive oil is essentially just pressed olives. No chemicals, no heating. The same principle as orange juice: fruit in, juice out. What you get is not just oil; it's everything the olive naturally contains. Oleic acid, vitamin E, and a range of bioactive compounds specific to the olive, including: polyphenols.

These polyphenols make the difference. They give EVOO its bitterness, its throat tickle, its character. And they are the reason scientists have been studying olive oil for decades while other oils are largely overlooked.

Not because other oils are inherently bad. But because the polyphenols that make olive oil interesting, such as hydroxytyrosol, oleocanthal, and oleuropein, simply aren't present in them. They are specific to the olive. They are in the fruit itself, bound to the olive's cells. Extra virgin is the only way to get them intact into the oil, because as soon as you heat or refine olive oil, they disappear.

That doesn't mean every bottle of extra virgin olive oil is automatically the same. Olive variety, weather conditions, harvest time, processing, storage, and age make a big difference. Especially the polyphenol content can vary greatly as a result. Fresh harvest, dark packaging, good storage, and analytical data truly make a difference. With good EVOO, you don't just taste quality, you also see it reflected in its composition.

The olive tree grows in places where many other trees would give up. Especially drought, heat, and poor soil can weaken a tree. To endure this, the olive tree produces substances that protect it: against heat, sun, oxidation, and infection. These substances are in the olive. If you press them without heating or refining, they will also be in the olive oil.

So you are eating the defense compounds of a tree that has managed to survive for thousands of years in conditions that most plants cannot.

What these polyphenols do in your body is now fairly well researched. They inhibit the oxidation of fats in your blood, the process where LDL gets damaged and irritates the inside of your blood vessels. They dampen inflammatory pathways. They support your mitochondria, the energy powerhouses of your cells that are the first to degrade with aging. And they do this not as a pill or extract, but as part of regular food.

If there is one health topic where extra virgin olive oil excels, it is heart and blood vessels. Not because of a single isolated study, but because of a broad line of research into Mediterranean diet, olive oil, fat quality, and polyphenols.

The most famous study is PREDIMED. In it, 7,447 people with an increased risk of cardiovascular disease were followed. The group consuming a Mediterranean diet with extra virgin olive oil showed more favorable outcomes than the control group with low-fat advice.

For The Olive Label, this is precisely the right way to look at EVOO: as a daily staple in the kitchen. Not as a luxury extra, but as an oil you truly use.

For olive oil, there is one official health claim approved in the European Union: EU-432/2012. This claim precisely concerns polyphenols and fats in the blood. Narrowly formulated, but important: olive oil polyphenols have passed the European assessment.

That sounds like a biology textbook, but in plain language, it means that the polyphenols in olive oil act as special antioxidants. They help protect your body against harmful daily influences, such as stress, air pollution, and normal aging processes. The polyphenols in olive oil help protect fats in your blood from oxidation. Oxidation of fats, including LDL, plays a role in the broader story surrounding heart and blood vessels.

The claim is often practically converted to approximately 250 mg/kg of relevant phenolic compounds. However, legally, it specifically concerns hydroxytyrosol and its derivatives per 20g of olive oil, not an arbitrary total polyphenol measurement. An up-to-date analysis per batch therefore remains important.

A good extra virgin olive oil can sting the back of your throat. That's not a mistake. This sting is partly due to oleocanthal, a substance mainly found in good EVOO.

Oleocanthal became known through a study in Nature in 2005. Researchers observed that this substance in laboratory research affects the same enzyme pathway as ibuprofen. Oleocanthal does not turn olive oil into a painkiller, but it has the same anti-inflammatory effects and suddenly makes that characteristic throat sting, that pepper in your throat, a lot more interesting.

Dementia is a heavy word, but precisely because of this, new research into olive oil and brain health attracts so much attention. And rightly so: the large Harvard study from 2024 is too interesting to ignore.

For this study, scientists followed more than 92,000 people over a period of 28 years! It turned out that people who used more than 7 grams of olive oil daily had more favorable dementia-related outcomes than people who rarely or never used olive oil.

The evidence is younger than for cardiovascular disease, but it aligns well with what we already know about polyphenols, oxidation, and inflammatory processes.

The answer depends on the question you ask.

The Harvard study mentioned above, published in JAMA Network Open in 2024, followed more than 92,000 people for 28 years. People who used more than 7 grams of olive oil daily had a 28% lower risk of dementia-related mortality compared to people who rarely or never ate olive oil. Seven grams is one regular spoon from your cutlery drawer. No special extra virgin oil, no quality requirement. Just extra virgin olive oil, every day, 7 grams.

In the same vein, the 2022 JACC study, also from Harvard, shows that higher olive oil intake is associated with more favorable long-term outcomes, especially when olive oil replaced other fats such as butter, margarine, or mayonnaise.

Then there's a second story, about a specific mechanism. Based on the EUROLIVE study, the European Union has approved one official health claim for olive oil polyphenols, laid down in EU Regulation 432/2012. For this claim, two conditions apply simultaneously: the oil must contain at least 5 mg of hydroxytyrosol and derivatives per 20 grams, AND you must use 20 grams of that oil daily. That's two to three regular spoons from your cutlery drawer. Not every extra virgin olive oil meets that polyphenol threshold. A lab analysis per batch is the only way to be sure.

• ✓ Use EVOO as a daily base over vegetables, salads, legumes, and soup.
• ✓ Also use good extra virgin olive oil for warm preparations. EVOO is perfectly suitable for frying and roasting.
• ✓ Choose fresh harvest, good packaging, and clear origin.
• ✓ For polyphenol-rich oil, pay attention to current analysis data, not just pretty words.

Good EVOO does not belong at the back of the cupboard. It belongs on the counter and on the table.