Olive Oil
Also known as: Olea europaea oil, Extra virgin olive oil, EVOO, Olive fruit oil
The Mediterranean cornerstone — the best-evidenced dietary oil for cardiovascular health, with a quieter skincare résumé.
In short
Olive oil, especially extra virgin (EVOO), is the fat at the center of the Mediterranean diet — and the oil with the strongest cardiovascular evidence on earth. The landmark PREDIMED trial showed that a Mediterranean diet supplemented with olive oil or nuts reduced cardiovascular events by roughly 30% versus a low-fat diet, and subsequent analyses confirm the pattern. The chemistry behind it: roughly 70% oleic acid (a monounsaturated fat) plus a distinctive polyphenol load — oleuropein, hydroxytyrosol — that protects LDL from oxidation and damps inflammation. In skincare it is a mild, classic emollient; in the kitchen it is the reference standard oil.
- PREDIMED: ~30% fewer cardiovascular events on olive-oil Mediterranean diet
- ~70% oleic acid (monounsaturated)
- EVOO polyphenols (oleuropein, hydroxytyrosol) are the differentiator
- Refined 'light' olive oil loses the polyphenol benefit
What is Olive Oil?
Olive oil is what a well-evidenced food looks like: decades of epidemiology, a landmark randomized trial, and a coherent biochemical story all pointing the same direction. The PREDIMED result — roughly 30% fewer major cardiovascular events in high-risk adults on an olive-oil-rich Mediterranean diet — remains one of the strongest dietary interventions ever tested. The chemistry explains why the bottle grade matters: the heart benefit is not just oleic acid but the polyphenol fraction, which refined 'light' olive oil largely loses. Skincare adds a quieter second career as a mild emollient with antioxidant touches.
Where it comes from
Natural sources
- Pressed from the fruit of Olea europaea, cultivated for 6,000+ years
- Extra virgin = cold-pressed, unrefined, polyphenol-rich
- Refined (light/pure) = processed, most polyphenols removed
How it's made
Not synthesized; grades differ by processing, not variety alone.
What it does in products
Benefits
Cardiovascular disease prevention
strong evidenceThe PREDIMED randomized trial found a Mediterranean diet with EVOO reduced major cardiovascular events by ~30% in high-risk adults; meta-analyses support substitution of saturated fats with olive oil.
LDL oxidation resistance
strong evidenceEVOO polyphenols measurably reduce LDL oxidation — a key step in atherosclerosis — an effect refined olive oil does not deliver.
Inflammatory markers
moderate evidenceRegular EVOO consumption lowers CRP and other inflammatory markers in trials.
Skin emollient
moderate evidenceA classic mild emollient for dry skin and hair, though heavier than purpose-designed cosmetic oils; used in traditional soapmaking (Castile).
Side effects & safety
Safety considerations
- Dietary and topical use is safe; no specific concerns.
- None significant; as a fat, it slows absorption of some medications taken together.
- Not for: None of note
How it's used
In supplements
The PREDIMED intervention used ~4 tablespoons of EVOO daily within a Mediterranean pattern. For cardiovascular benefit, use EVOO as your primary added fat — replacing butter and refined oils — rather than as an add-on.
Regulatory status
- Food (GRAS) and cosmetic ingredient; FDA permits a qualified health claim on monounsaturated fats from olive oil reducing coronary heart disease risk.
- GRAS (generally recognized as safe) for food use.
- INCI name on cosmetic labels: Olea Europaea (Olive) Fruit Oil.
Popular products containing Olive Oil
- Extra Virgin Olive OilCalifornia Olive Ranch · Food
- Olive Virgin Oil (skincare)DHC · Skincare
- Extra Virgin Olive OilBragg · Food
Product names and brands are shown for reference and belong to their respective owners.
Why the grade matters: extra virgin vs 'light'
All olive oil is mostly oleic acid, but the cardiovascular and anti-inflammatory evidence concentrates in extra virgin grade — because the polyphenols (oleuropein, hydroxytyrosol, oleocanthal) survive only in unrefined, cold-pressed oil. Refined olive oil is stripped to a neutral, high-smoke-point fat that is still healthier than butter but lacks the antioxidant chemistry behind EVOO's trial results. The practical shopping rule: pay for EVOO where it is consumed raw or low-heat (dressings, finishing), where the polyphenols arrive intact; use the cheaper refined grade for high-heat cooking where they would degrade anyway.
Frequently asked questions
How much olive oil per day is recommended?
The trial-backed pattern is roughly 3–4 tablespoons daily as your primary dietary fat, within an overall Mediterranean diet. The key is substitution — olive oil replacing butter and refined oils — not addition.
Is olive oil good for your skin?
It is a classic mild emollient and traditional skincare oil, but for modern cosmetics it is heavier and less elegant than squalane or jojoba. Fine for body and dry patches; not the first choice for facial routines.
Can I cook with extra virgin olive oil?
Yes — despite the old myth, EVOO is stable for everyday sautéing; its smoke point (~190–205°C) covers most home cooking. Very high-heat searing is better left to refined oils.
The bottom line
Olive oil is the reference standard dietary oil, with randomized-trial-level evidence for cardiovascular protection concentrated in extra virgin grade. Use EVOO as your daily fat, cook with confidence, and treat the skincare use as a traditional bonus.
References
- PREDIMED: Mediterranean diet and cardiovascular events. PubMed (National Library of Medicine). https://pubmed.ncbi.nlm.nih.gov/?term=PREDIMED+olive+oil+cardiovascular
- Olive oil polyphenols and LDL oxidation — literature search. PubMed (National Library of Medicine). https://pubmed.ncbi.nlm.nih.gov/?term=olive+oil+polyphenol+LDL+oxidation
- Oleuropein compound summary. PubChem (National Library of Medicine). https://pubchem.ncbi.nlm.nih.gov/compound/5281544
- Olive oil and inflammation — literature search. PubMed (National Library of Medicine). https://pubmed.ncbi.nlm.nih.gov/?term=olive+oil+inflammatory+markers+trial