Publications

The reading behind the ritual.

We don’t ask you to take the health of olive oil on faith. Below is a working library of the research on extra virgin olive oil and its polyphenols — longevity, the heart, the brain, inflammation, metabolism — each linked to its original source so you can read it yourself.

01 · Longevity

19% lower all-cause mortality

Prospective cohort · 92,383 adults · 28 years

Consumption of Olive Oil and Risk of Total and Cause-Specific Mortality Among U.S. Adults

Guasch-Ferré M, et al. · J. Am. Coll. Cardiol. (JACC), 2022

In two U.S. cohorts followed for nearly three decades, adults eating more than half a tablespoon of olive oil a day had a 19% lower risk of dying from any cause (HR 0.81), with parallel reductions in cardiovascular and neurodegenerative death. Swapping butter, margarine, or mayonnaise for olive oil tracked with lower mortality.

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02 · Cardiovascular

~30% fewer major cardiovascular events

Randomized controlled trial · 7,447 adults · PREDIMED

Primary Prevention of Cardiovascular Disease with a Mediterranean Diet Supplemented with Extra-Virgin Olive Oil or Nuts

Estruch R, et al. · New England Journal of Medicine, 2018

The landmark dietary-prevention trial. Among adults at high cardiovascular risk, a Mediterranean diet enriched with extra virgin olive oil cut the combined rate of heart attack, stroke, and cardiovascular death by about 30% (HR 0.70) versus a reduced-fat control diet.

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03 · Blood lipids

The only EU-authorized olive-oil health claim

EU-authorized health claim · Regulation 432/2012

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

EFSA NDA Panel · European Commission · Commission Regulation (EU) No 432/2012

Europe permits a single on-label health claim for olive oil polyphenols: they help protect blood lipids from oxidative stress. It applies only to oils containing at least 5 mg of hydroxytyrosol and its derivatives per 20 g — a bar a high-polyphenol oil clears comfortably — at a daily intake of 20 g.

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04 · Inflammation

Oleocanthal inhibits COX enzymes like ibuprofen

Mechanistic discovery · the oleocanthal paper

Phytochemistry: Ibuprofen-like activity in extra-virgin olive oil

Beauchamp GK, Breslin PAS, et al. · Nature, 2005

The study that explained the peppery sting of fresh olive oil. Oleocanthal — the polyphenol responsible for that throat-catch — inhibits the same COX-1 and COX-2 enzymes as ibuprofen, with a strikingly similar profile, giving a molecular basis for the anti-inflammatory reputation of the Mediterranean diet.

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05 · Brain

28% lower dementia-related mortality

Prospective cohort · 92,383 adults · 28 years

Consumption of Olive Oil and Diet Quality and Risk of Dementia-Related Death

Tessier A-J, Guasch-Ferré M, et al. · JAMA Network Open, 2024

Adults consuming at least 7 g of olive oil a day had a 28% lower risk of dying from dementia (HR 0.72) than those who rarely used it. The association held after adjusting for overall diet quality — suggesting a benefit to the aging brain beyond simply eating well.

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06 · Metabolic

~51% lower type 2 diabetes incidence

Randomized controlled trial · 418 adults · PREDIMED-Reus

Reduction in the Incidence of Type 2 Diabetes With the Mediterranean Diet

Salas-Salvadó J, et al. · Diabetes Care, 2011

In a Mediterranean-diet trial with no calorie limits and no added exercise, participants assigned to the olive-oil arm developed roughly half as many new cases of type 2 diabetes (HR 0.49) as the low-fat control group — evidence that the fat you choose matters as much as the fat you cut.

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07 · Blood pressure

Systolic blood pressure down ~8 mmHg

Double-blind crossover RCT · polyphenols isolated

Olive Oil Polyphenols Decrease Blood Pressure and Improve Endothelial Function in Young Women with Mild Hypertension

Moreno-Luna R, et al. · American Journal of Hypertension, 2012

A clean test of the polyphenols themselves: the only difference between the two diets was whether the olive oil kept its polyphenols. The high-polyphenol oil lowered systolic pressure by about 8 mmHg and improved blood-vessel function — pointing at the polyphenols, not just the fat, as the active agent. (Small, single-sex sample.)

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08 · Cancer

Fewer invasive breast-cancer cases

Randomized controlled trial · 4,282 women · PREDIMED

Mediterranean Diet and Invasive Breast Cancer Risk Among Women at High Cardiovascular Risk

Toledo E, et al. · JAMA Internal Medicine, 2015

A pre-specified secondary outcome of the PREDIMED trial and the first randomized evidence that a long-term diet could lower breast-cancer incidence: women on the Mediterranean-diet-plus-EVOO arm had markedly fewer invasive cases than controls. The event count was small, so the estimate is promising rather than settled.

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How to read this

Randomized trials show cause; cohort studies show association — we label each one so you know which is which. Several of these findings come from the PREDIMED program, and the strongest single claim for polyphenols is the one Europe has formally authorized. This library is provided for general education about olive oil and its constituents; it is not medical advice, and nothing here is a claim that our product treats or prevents any condition.