Coconut oil for skin and hair: what it actually does

What is coconut oil, and why does the answer depend on where you put it?

Coconut oil is the fat pressed from a coconut kernel, and about half of it is one unusually small fatty acid. A review of plant oils in the International Journal of Molecular Sciences gives the composition as lauric acid (49%), myristic acid at 18 per cent, and everything else in single figures. That one number is the reason this question has two answers instead of one.

Lauric acid is twelve carbons in a straight line, small and flat where most cosmetic oils are large and kinked. On a hair shaft that means it can get inside the fibre, which is the basis of the only hair oil result in this field worth quoting. On facial skin the same saturated fat sits in the follicle opening and stays there. A review of cosmetic oils in ACS Omega lists coconut oil’s drawbacks, and the first is highly comedogenic.

So the honest answer is a split rather than a verdict. Coconut oil is genuinely good on hair, a real risk on an acne prone face, and unremarkable on the rest of the body. Anybody selling it as a miracle, and anybody calling it poison, is answering half the question.

Does coconut oil actually do anything for hair?

Coconut oil reduces the protein your hair loses when you wash it, which is a measured effect and an unusual thing for a hair oil to have. The finding is from a study by Rele and Mohile in the Journal of Cosmetic Science in 2003, and a review in the International Journal of Trichology reports it: coconut oil was the only oil found to reduce the protein loss for both undamaged and damaged hair when used as a prewash and postwash grooming product. Sunflower oil and mineral oil, tested the same way, did not.

The reason is physical, and it is also why most hair oils do nothing you could measure. A hair shaft is not skin. StatPearls, on the NIH’s own bookshelf, describes the mature fibre as the hair shaft cuticle, the cortex and the medulla: overlapping scales outside, and the keratin the hair is mostly made of underneath. The trichology review explains that coconut oil, a triglyceride of lauric acid, has a high affinity for hair proteins and is able to penetrate inside the hair shaft, while mineral oil is a hydrocarbon that does not penetrate and sunflower oil is too bulky, not reaching the cortex.

Getting inside buys one specific thing. The same review notes that oils which penetrate reduce the water the hair absorbs and how much it swells, and that this results in lower hygral fatigue (repeated swelling and drying), which is one of the ways ordinary washing damages hair over years.

Two limits belong beside that. This is not a hair growth treatment, nothing in it touches follicles or shedding, and the measurements were made on hair tresses rather than on people. The other oils are not useless either: the same review credits the film they leave on the cuticle with enhancing shine and diminishing friction.

Does coconut oil cause breakouts on your face?

Coconut oil blocks pores, and on skin that already forms comedones it is one of the more reliable ways to make things worse. A review in Frontiers in Pharmacology, writing about the saturated oils coconut kernel oil belongs with, says their application occludes the skin surface and leads to break outs on most skin types, other than very dry skin, due to their high comedogenic properties.

StatPearls calls the result a microcomedo, a small, hyperkeratotic plug primarily composed of corneocytes and the precursor to every acne lesion there is, and it puts oil based cosmetics on its list of proposed contributory factors.

The route most people meet this by is not the face. The American Academy of Dermatology has a page for it, and its first line is that the oils in hair care products can cause tiny breakouts along your hairline and forehead. The AAD calls the result acne cosmetica, and a review in the Journal of Clinical and Aesthetic Dermatology is specific about which oil. It describes coconut oil applied to the hair for moisturisation, and notes that this practice often leads to pomade acne, which is characterized by numerous closed comedones over the forehead and temples.

If that sounds like your hairline, the AAD’s instruction is to stop and wait, because it can take 4 to 6 weeks for the acne to clear. It also asks you to wash everything your head touched, the step people skip: pillow cases, sheets, caps, hats, headbands. Four to six weeks is a long time to look at a spot you have already stopped feeding, and our post on getting rid of a pimple overnight covers what a single evening genuinely offers in the meantime.

One counterargument deserves an answer. Monolaurin, which comes from coconut oil’s lauric acid, displays antimicrobial activity against the bacterium involved in acne, and that result is real. But StatPearls lists four things happening at once in acne: sebum, follicular hyperkeratinization, C acnes and inflammation. Killing bacteria in a dish addresses one, while the vehicle carrying it blocks follicles, which is another.

Is coconut oil a good moisturiser for the rest of your body?

Body skin is where coconut oil is least contested, and the evidence for it is small but real. The International Journal of Molecular Sciences review reports a randomised double blind trial finding coconut oil as effective and safe as mineral oil when applied as moisturizers for mild to moderate xerosis, which is the clinical word for ordinary dry skin.

The second result is in children with eczema. In a randomised double blind trial in mild to moderate paediatric atopic dermatitis, the review reports virgin coconut oil decreasing the severity of the disease, ameliorating disease severity index (SCORAD), and improving barrier function (TEWL and skin capacitance). Those are the standard measures of eczema severity and of how well skin holds water, and it beat mineral oil on both.

Read that at its actual size. These are individual trials rather than a body of guidance, no dermatology association recommends coconut oil for eczema on their strength, and uncontrolled eczema needs a doctor. Your chest and back have follicles too. Shea butter is the other plant fat people reach for on this job, and our post on shea butter asks the same questions of it, including which named bodies name it and for what.

Is coconut oil safe in pregnancy, while breastfeeding or with PCOS?

Coconut oil reads almost the same across the six profiles Truva answers for, and saying so is more useful than manufacturing a difference. Five of the six rows below are identical, because this is a placement question and a hair shaft is dead keratin whoever is holding it. The one profile that changes the answer is PCOS, in exactly one cell: the face.

If you have PCOS

PCOS is where coconut oil on the face stops being a caution and becomes a bad idea, and two published lists are why. NICHD’s fact sheet on the symptoms of PCOS names oily skin, and persistent acne that does not respond well to common treatments. StatPearls, listing what contributes to acne, names endocrine disorders, such as polycystic ovarian syndrome in the same list as oil based cosmetics. Together those make coconut oil on a PCOS face a highly comedogenic fat on skin that already will not stop making comedones.

No body has published a PCOS specific rule about coconut oil, and this site does not pretend otherwise: that cell is Truva’s judgement from two published findings, labelled as one. If you want the hair benefit anyway, keep the oil on the lengths and ends, nothing at the roots.

If you are pregnant

Pregnancy does not change what coconut oil does to skin, and no obstetric body has published a rule about it either way. ACOG’s list of over the counter ingredients that can be used during pregnancy covers acne actives and does not name coconut oil in either direction, which is a gap rather than a warning. What ACOG does address is the job people buy it for. On stretch marks it says there is no proof that any of these treatments work, and that a heavy moisturiser may keep your skin soft but will not get rid of stretch marks.

One more line matters if pregnancy has brought acne with it, which ACOG says is common. Its advice is to choose oil free cosmetics and, if you have oily hair, to keep your hair off your face. That is the AAD’s hair oil instruction, arrived at from the other direction.

If you are breastfeeding

Breastfeeding raises one unanswered question, and it is about where the oil goes. The NIH’s Drugs and Lactation Database holds information on drugs and other chemicals to which breastfeeding mothers may be exposed, and it is the body that rules on where a topical may go on a breastfeeding parent. Its index carries cranberry, comfrey, coriander and cumin. It has no entry for coconut oil. Read that calmly: this is a food fat used as an emollient and nobody has raised a concern for LactMed to answer, but silence is still not a clearance.

If you are postpartum or trying to conceive

Postpartum and trying to conceive both return you to the general answer with nothing added. Neither has a published rule about coconut oil, and unlike a topical retinoid there is no proposed mechanism that would give either one a reason to differ. That is a real result rather than a gap in our reading: the ingredients Truva does flag before conception are listed in full, and coconut oil is not among them.

This split is what Truva was built to make. The comparison pages set out why a scanner that never asks your situation cannot make it.

When should a breakout from coconut oil go to a dermatologist?

Acne that has not cleared six weeks after you stopped the product is the point the AAD names for getting help, because by then the product has been ruled out. So is acne that is leaving marks, and acne that is severe, late in onset or not responding to ordinary treatment, which NICHD lists among the symptoms that lead to a PCOS diagnosis.

Key takeaways

• Coconut oil is about half lauric acid, a small straight fatty acid that can get inside a hair fibre. That one property is why both the hair evidence and the skin problem exist.
• On hair it was the only one of three oils tested that reduced protein loss, in a study reported in the Journal of Cosmetic Science in 2003. Sunflower and mineral oil sit on the cuticle instead.
• On facial skin it is highly comedogenic. The AAD names the oils in hair care products as a cause of breakouts along the hairline and forehead, and gives 4 to 6 weeks for that acne to clear once you stop.
• On body skin it is unremarkable and mildly positive, matching mineral oil for dry skin and beating it in one paediatric eczema trial.
• PCOS is the profile this changes for, because persistent acne and oily skin are on NICHD’s symptom list. Pregnancy and breastfeeding have no published rule about coconut oil at all, which here is unremarkable rather than ominous.

Where this came from

Every health claim on this page links to the body that published it. Nothing here comes from another blog.

Every link above was fetched and confirmed to resolve on 6 September 2026.

Truva summarises published guidance from bodies including ACOG, the FDA, the EU SCCS and the Cosmetic Ingredient Review. It has no access to your medical history and it is not a substitute for your doctor, dermatologist or midwife. This post was written by the Truva team from the sources listed above. It has not been reviewed by a clinician, and nothing in it is a diagnosis or a prescription. If you are pregnant, breastfeeding or being treated for PCOS, take the ingredient list to the person looking after you.