SignalTrace

Coconut Oil

John Montgomery6 min read

Coconut Oil

Virgin coconut oil (VCO) is one of the most popular kitchen-cupboard moisturisers for Atopic Dermatitis. In a Malaysian tertiary clinic, parents named it among their commonest complementary remedies for childhood eczema (Koo 2020, via Herbal and Home Remedies for Eczema). Its chemistry is different from most plant oils. According to Verallo-Rowell 2008, VCO is about 92% saturated fatty acids and only about 8% unsaturated, while virgin olive oil is about 82% unsaturated. Its main fatty acid is Lauric Acid, and lauric acid’s monoglyceride, monolaurin, kills bacteria, fungi and viruses in vitro. Because it is so saturated, VCO resists breaking down into the free fatty acids that give rancid oils their irritancy. It also contains very little Oleic Acid, the fatty acid that damages the barrier in Olive Oil. Traditionally it has been used in the tropics both to moisturise dry skin and to treat skin infections.

Coconut Oil [part-of] Herbal and Home Remedies for Eczema Lauric Acid [part-of] Coconut Oil Coconut Oil [relates] skin barrier

Paediatric evidence. There is one paediatric RCT. Evangelista 2014 was a double-blind trial of 117 children aged 1–13 (WHAM summary) with mild–moderate AD in the Philippines. Over 8 weeks, VCO reduced SCORAD by 68% and Mineral Oil by 38% (P<0.001). 46% of the VCO group had an “excellent” response, against 19% on mineral oil. Transepidermal Water Loss fell from 26.7 to 7.1 with VCO and from 24.1 to 13.6 with mineral oil, and skin capacitance (hydration) also improved more with VCO. This is a single trial from one centre, and the comparator was mineral oil rather than a standard licensed emollient. Nobody has replicated it in toddlers, and nobody has compared VCO with the emollients that UK or US guidelines actually prescribe.

Coconut Oil [treats] Atopic Dermatitis Coconut Oil [contradicts] Mineral Oil Coconut Oil [prevents] Transepidermal Water Loss

Antibacterial claims against S. aureus. Verallo-Rowell 2008 (Dermatitis) was a double-blind RCT in 52 adults with AD comparing VCO and virgin olive oil, applied twice daily for 4 weeks. Among subjects colonised with Staphylococcus aureus at baseline, 1 of 20 on VCO was still culture-positive at the end (5%), compared with 6 of 12 on olive oil (50%). That gives a relative risk of 0.10 and a number needed to treat of 2.2. Objective SCORAD fell with both oils but more with VCO. The authors suggest VCO and monolaurin “may be useful” for proactive decolonisation. The study had no children, colonisation at baseline was unbalanced between the groups (20 vs 12), and no trial has tested whether decolonising with VCO reduces Infected Eczema. The claim is plausible but unproven for toddlers, and it does not replace medical assessment of a weeping or crusted flare.

Coconut Oil [opposes] Staphylococcus aureus Staphylococcus aureus [worsens] Atopic Dermatitis

Conflict: [Evangelista et al., Int J Dermatol, 2014] and [Verallo-Rowell et al., Dermatitis, 2008] say virgin coconut oil beat its comparator (mineral oil in 117 children; olive oil in 52 adults) on SCORAD, and in the adult trial also on S. aureus decolonisation. [Karagounis et al., Pediatr Dermatol, 2019] and [AAP, n.d.] say its role in AD “remains to be determined” and that more studies are needed before recommending it. Unresolved — add to open_questions.

Toddler safety. There are no signals of serious harm, but the paediatric safety data are thin. Most coconut oils have a low linoleic:oleic profile, so the Vaughn 2018 fatty-acid argument neither clearly favours nor condemns them. Popular sources often describe coconut oil as “comedogenic” (pore-clogging). That claim was not verified against a primary source for this note, and it matters more for facial acne-prone skin than for toddler eczema. The more practical risks are allergy and substitution. Coconut is botanically a drupe, not a tree nut, but individual children can react to it. Parents who stop a prescribed emollient that was working and switch to oil alone often report a flare (see below). As with any home remedy, use only virgin, cold-pressed, fragrance-free oil, avoid products blended with Essential Oils, and patch-test a small area first.

Coconut Oil [relates] Emollient Therapy Essential Oils [worsens] Atopic Dermatitis

Nut-based oils and peanut/nut sensitisation

Coconut oil itself is not a tree nut, but many “natural” baby oils and balms blend in almond, macadamia, shea or peanut (arachis) oil. (Refined shea butter has no detectable protein and is judged very low-risk by FARRP; unrefined shea is untested. See Shea Butter.) Lack 2003 (NEJM, ALSPAC cohort of 13,971 children) found that using skin preparations containing peanut oil was independently linked to later peanut allergy (OR 6.8, 95% CI 1.4–32.9). The proposed route is sensitisation through inflamed eczematous skin. Do not apply nut-derived oils to a toddler’s broken or eczematous skin. Check labels for Arachis hypogaea, Prunus amygdalus dulcis and similar names. See Peanut Oil Sensitisation.

Peanut Oil Sensitisation [relates] Food Allergy

What parents report (evidence: anecdotal, Reddit threads via search snippets). Parents are split. Some say it “soothed” the skin or “helped a bit” on small eczema patches, or that coconut oil followed by Aquaphor is “magic” on bad days. Others say it “did not help clear up” the eczema, that it “smelled awful” and left skin “super red… almost worse than ever”, or simply “do not use coconut oil!“. One parent of a 5-month-old stopped a cream that was working, used only cold-pressed coconut oil overnight, and found the face patch “even more red and worse” the next morning. Commenters often suggest stopping in case of coconut allergy, point out that “oils trap in existing moisture, but they don’t add moisture”, and advise avoiding “any nut or coconut oils… until you know they aren’t allergic”. One adult attributed her reactions to nickel in coconut oil. That is unverified.

Coconut Oil [relates] Steroid Phobia

Connections

Graph View

Backlinks