Every few months the internet rediscovers olive oil as a beauty product: a moisturiser, a hair mask, a makeup remover, a cure for almost everything. We are an olive oil company. It would be easy, and profitable, to nod along.<\/p>\n
Instead, here is the honest version \u2014 what olive oil genuinely does on skin and hair, where the evidence is thinner than the claims, who should probably leave it in the kitchen, and how to use it sensibly if you want to. Six generations of pressing olives has taught the family one thing above all: the oil is remarkable enough that it does not need to be oversold.<\/p>\n
Extra virgin olive oil is roughly 70\u201380% oleic acid, a monounsaturated fat, plus smaller amounts of linoleic and palmitic acids. It also carries vitamin E (tocopherols), squalene \u2014 a compound your own skin produces in its sebum \u2014 and the phenolic compounds that give a fresh oil its bitterness and peppery bite. Those polyphenols<\/a> are antioxidants, and they are the source of most of the interesting claims.<\/p>\n That composition explains the two things olive oil reliably does topically. It is an emollient<\/em>: it sits between the flakes of the skin’s outer layer and makes the surface feel smooth. And it is mildly occlusive<\/em>: it slows the rate at which water evaporates from the skin. Those are real, measurable effects, and they are why an oil feels good on dry hands or cracked heels.<\/p>\n Here is the part most beauty articles skip. A study published in Pediatric Dermatology<\/em> in 2013 by Danby and colleagues tested olive oil and sunflower seed oil on adult forearms over four weeks. Sunflower oil improved the skin barrier; olive oil measurably weakened it, reducing barrier integrity even in people with no history of eczema. The suspected reason is the high oleic acid content, which appears to disrupt the ordered lipid structure of the stratum corneum. Follow-up work on newborns has produced mixed but broadly cautious results, and several dermatology bodies now advise against olive oil as a routine infant massage or eczema oil.<\/p>\n This does not make olive oil dangerous. It means the popular framing \u2014 nature’s perfect moisturiser, good for everyone, especially babies \u2014 is not supported. On intact adult skin, used occasionally on dry patches, it is fine. On compromised, eczema-prone or infant skin, there are better-evidenced choices, and that is worth knowing before you take advice from a caption.<\/p>\n If you are acne-prone, olive oil is a poor bet on the face; it is comedogenic for many people. If you have seborrheic dermatitis or persistent dandruff, note that the Malassezia<\/em> yeasts implicated in those conditions feed on certain lipids, and slathering oil on the scalp can make matters worse rather than better. And if you have eczema or a damaged barrier, take the study above seriously. None of this is medical advice \u2014 if a skin condition is bothering you, a dermatologist is a far better investment than a kitchen cupboard.<\/p>\n Hair is easier ground. Oils help hair in two different ways: by coating the cuticle, which reduces friction, frizz and mechanical damage; and by penetrating into the cortex, which reduces the protein loss that washing and heat cause. Olive oil is good at the first and comparatively poor at the second. Research on oil penetration in hair has consistently found that smaller, straight-chain fats \u2014 lauric acid in coconut oil is the classic example \u2014 get inside the fibre far more readily than bulky monounsaturated oleic acid, which largely stays on the surface.<\/p>\n So: as a pre-wash treatment for shine, slip and detangling on dry, coarse or chemically treated hair, olive oil works well. As a deep protein-preserving treatment, it is outperformed. Use it warm, apply to lengths and ends rather than the scalp, leave it for thirty minutes, and shampoo twice \u2014 olive oil is heavy, and under-rinsed hair looks greasy for days.<\/p>\n This is where we do have a stake, and where the advice is genuinely practical. Most of the olive oil sold as a beauty ingredient is refined, deodorised, or simply old \u2014 and old oil is not neutral. As olive oil oxidises it produces aldehydes and peroxides; rancid oil smells of crayons and putty for a reason, and applying an oxidised fat to skin is the opposite of an antioxidant treatment. If your bottle has been open on a sunny counter since last spring, it belongs in the bin, not on your face. Our guide to how long olive oil actually lasts<\/a> covers the timeline.<\/p>\n If you want the antioxidant content the claims are built on, you need oil that still has it: genuinely extra virgin, cold-extracted, dark glass, a harvest date on the label, and stored away from heat and light. Those are the same markers that define real quality in an olive oil<\/a>, whatever you plan to do with it. Patch test on your inner arm first, and give it a few days before committing.<\/p>\n Here is the conclusion an olive oil company arguably should not lead with, and we will anyway: the best-supported route from olive oil to better skin runs through your fork, not your bathroom shelf. The substantial clinical evidence for extra virgin olive oil \u2014 cardiovascular outcomes, inflammatory markers, the European Food Safety Authority’s approved claim on phenolic compounds protecting blood lipids from oxidative damage \u2014 all comes from dietary<\/em> studies. We set out what the research does and does not show in is olive oil good for you<\/a>.<\/p>\n A tablespoon of a fresh, polyphenol-rich oil over vegetables every day has more science behind it than any mask. It also tastes considerably better.<\/p>\nWhere the evidence gets complicated<\/h2>\n
Who should be careful<\/h3>\n
Olive oil for hair: useful, but not the way people think<\/h2>\n
If you use it, use a good one<\/h2>\n
The strongest evidence is for eating it<\/h2>\n