Psoriasis patients respond to olive oil supplement
Olive oil is one of the oldest cosmetics we have. It is also one of the most over-claimed. Separating a decent emollient from a cure for skin disease takes about two minutes of honest reading.
Long before it was a health food, olive oil was a cosmetic. Greek athletes oiled themselves and scraped the mixture off with a strigil; Roman bathers did much the same; midwives across the Mediterranean have used it on newborns for centuries. That antiquity is genuinely interesting, but it is not evidence, and the modern habit of citing tradition as proof does the subject no favours. What we can say with confidence is narrower and more useful than the marketing suggests.
What olive oil does on skin
Chemically it is mostly oleic acid, a monounsaturated fat, with smaller fractions of palmitic and linoleic acid, plus squalene and a modest amount of vitamin E and phenolic compounds. Applied to skin, it functions as an occlusive emollient: it sits on the surface, slows water loss, and makes the skin feel softer and less tight. That is a real effect and it is why oil has been used on dry skin for millennia.
The complication is oleic acid itself. There is a body of dermatological research suggesting that high-oleic oils can disrupt the skin barrier in some circumstances, particularly on already-compromised or infant skin, where linoleic-rich oils behave better. It is not a reason to panic — plenty of people use olive oil on their skin with no trouble at all — but it is a reason to be cautious about applying it liberally to inflamed, broken or very young skin, which is precisely where the boldest claims tend to be aimed.
| Main fat | Oleic acid (monounsaturated), typically the large majority |
|---|---|
| Minor fats | Palmitic and linoleic acid |
| Other components | Squalene, vitamin E, phenolic compounds |
| Established effect | Occlusive emollient — slows water loss, softens skin |
| Claimed effects | Anti-inflammatory, wound healing, psoriasis relief |
| Evidence for those | Limited; small studies, mixed results |
| Main caution | High oleic content may disturb a compromised skin barrier |
Where the evidence thins out
Claims about olive oil and specific skin conditions — psoriasis above all — rest on a small and mixed literature. Psoriasis is an immune-mediated condition, not a dryness problem, and while an emollient can ease the discomfort of scaling and reduce the itch of dry plaques, that is symptom relief and not treatment of the disease. Some studies have looked at dietary fats, including olive oil and marine oils, in inflammatory skin conditions, with modest and inconsistent results. Nothing in that literature supports substituting olive oil for a treatment plan.
Be especially wary of two moves. The first is the leap from a laboratory finding about a single olive compound to a claim about a bottle of oil, when the concentration in the bottle is a tiny fraction of what the study used. The second is the appeal to antiquity — that people have used it for thousands of years, therefore it works. People have used many things for thousands of years. This is general information, not medical advice: if you have psoriasis or any persistent skin condition, that conversation belongs with a clinician.
Sensible use
Used as what it is — a simple, cheap, fragrance-free emollient — olive oil has an honest place. On dry hands, on rough heels, as a cleansing oil, as a carrier for a massage, it works perfectly well and costs a fraction of anything sold as a cosmetic. A few practical points make it better.
- Use a plain extra virgin oil with no added fragrance, and keep a separate small bottle for the bathroom.
- Patch test on a small area first, especially if your skin is sensitive or eczema-prone.
- Apply to slightly damp skin — an occlusive works by holding moisture in, so give it something to hold.
- Be cautious on broken, inflamed or infant skin, where the barrier is already compromised.
- Do not use it as a sunscreen. It offers no meaningful protection.
This is general information, not medical advice.
Olive oil on skin: common questions
Does olive oil treat psoriasis?
No. It can soften scaling and ease the discomfort of dry plaques, which is symptom relief, but psoriasis is an immune-mediated condition and the evidence does not support olive oil as a treatment.
Is olive oil good as a moisturiser?
As an occlusive emollient, yes — it slows water loss and softens skin. Apply it to slightly damp skin so it has moisture to seal in.
Can olive oil harm the skin barrier?
Research suggests high-oleic oils may disturb an already-compromised barrier, particularly on infant or inflamed skin. Most healthy skin tolerates it well, but patch test first.
Which olive oil should I use on skin?
A plain extra virgin with no added fragrance. Decant a small amount for bathroom use rather than dipping into your cooking bottle.
Does olive oil protect against the sun?
No. It provides no meaningful sun protection and should never be used in place of sunscreen. This is general information, not medical advice.
Every olive region has a family that swears by oil on the skin, and I would not argue with any of them — as an emollient it is decent, cheap and free of the twenty ingredients you cannot pronounce. What I do argue with is the shelf of expensive olive-based creams sold on the strength of a laboratory paper about a compound present in the jar at homeopathic levels. If oil suits your skin, buy a good plain bottle and skip the packaging. If your skin has a condition, that is a doctor’s problem, not a grocer’s.
Drawn from published dermatological research on plant oils and skin barrier function.