Porecelain

Flawless skin starts with the fine print.

Argan Oil

Argan oil rates Clear, but the rating is an inference, not a reading: we identified no comedogenicity assay of argan oil in any of the numeric papers we hold, and we could trace no primary assay behind the 0 that ingredient checkers print. The Clear rests on the absence of any evidence against it and a fatty-acid argument that is a hypothesis, not a finding — which is a weaker and different thing than a test it passed.

Clear Low confidence No legacy score. It does not appear in the assay corpus we searched.

No assay we can find. The linoleic-acid story is a hypothesis, not a finding.

What it is

Argan oil is the oil pressed from the kernels of the argan tree, Argania spinosa, which grows almost entirely in south-western Morocco. On a label it appears as Argania Spinosa Kernel Oil. Cosmetic argan is pressed from unroasted kernels; the culinary version, from roasted kernels, is a different and darker product. Chemically it is a triglyceride oil — its fats are the same fatty acids bound into glycerol that make up most vegetable oils. It is oleic-acid-dominant with a substantial share of linoleic acid: one peer-reviewed profile of Algerian argan reported oleic acid at 52.9%, linoleic at 25.0%, palmitic at 14.7% and stearic at 7.1%, with a large tocopherol fraction of roughly 637 mg/kg. A 2020 characterisation of cosmetic (unroasted-kernel) argan reported oleic acid at 46.6%, linoleic at 32.6% and palmitic at 13.1%. The numbers move with growing region, season and processing, which is worth holding onto because Fulton headed his oils section "VI. Oils*" and defined the asterisk exactly once, as "results depend on source of raw material." Alongside the fats sit tocopherols, polyphenols and unusual sterols (schottenol and spinasterol). Formulators use it as a lightweight emollient and a "dry" facial oil, and it is marketed heavily as a face and hair oil in its own right.

Why we rate it Clear

We rate argan oil Clear at Low confidence, and the honest account starts with what is missing. We identified no comedogenicity assay of argan oil, in either direction, in any of the numeric papers we hold. Fulton's 1989 rabbit-ear survey — the source of most of the comedogenic numbers now in circulation — has no argan or Argania row; we read its 220 rows off a 400dpi render, and its oils section runs through vegetable oils without one. His earlier 1984 survey, read in full off the journal scan, has no argan row either. Morris and Kwan's 1983 assay, an independent laboratory on the same 0–5 scale, tested thirty-two materials — seven lanolins, nine vegetable oils, eleven esters and five surfactants — and argan is not among the nine oils. Nguyen, Dang and Maibach's 2007 rabbit-ear study, on a 0–4 scale, names its fourteen test materials in its abstract, and argan is not one. acne.org, which catalogues eleven published comedogenicity studies from 1972 to 2009, gives it no entry we could find in any of them. Our own index of the legacy corpus files argan oil under never tested. That is why our legacy score field is blank rather than zero. The 0-out-of-5 that circulates for argan oil across ingredient checkers and beauty blogs is not a measurement, and we could not trace it to any primary assay. Some of the pages carrying it explain it with reasoning that is simply wrong: more than one states argan oil is non-comedogenic because it "does not contain fatty acids or triglycerides," when argan oil is precisely a triglyceride of oleic and linoleic acids. A number defended by a false premise is not a number we can inherit. Once a 0 sits in the same column as coconut butter's measured 4, an untested oil starts to look tested and cleared. So the Clear rests on two things, and both are weaker than a result. It is also an editorial risk classification rather than a measured grade: Clear here means we identified nothing on the record against this oil, not that a test cleared it. The first support is that absence — no exact argan oil comedogenicity assay was identified in the legacy corpus, in the full Fulton 1984 paper, or in the human literature searched for this audit, and nothing in those sources counts against it either. The second is a structure-activity inference: argan oil carries a meaningful share of linoleic acid, and the long-standing linoleic-acid hypothesis — Downing, Stewart, Wertz and Strauss, 1986 — proposes that acne-prone sebum is relatively deficient in linoleate and that higher-linoleic lipids sit more comfortably on acne-prone skin. That is a hypothesis about sebum composition. It was never a test of argan oil, and it is the reasoning behind argan's reputation as an "acne-safe" oil rather than evidence for it.

What the evidence doesn’t tell you

Absence of evidence is a weaker thing than evidence of absence. In the sources and searches reviewed for this page we identified no rabbit-ear assay of argan oil, no human comedone count and no cyanoacrylate follicular biopsy — and "no signal" and "no one looked" produce the same silence. Clear is the least-wrong call available here, not a clean bill of health, and if the assay were run tomorrow it could come back either way. An audit can establish that no argan assay turned up in the papers we hold and the searches we ran; it cannot establish that none was ever run anywhere. The mechanistic case is also less tidy than the marketing makes it sound, and the honest version points partly the other way. Argan oil is oleic-acid-dominant, not linoleic-dominant — oleic is its single largest component. Free oleic acid is not inert on this endpoint: in Kanaar's 1971 rabbit study it produced "marked inflammation and follicular keratosis," qualitatively, the same verbal grade he gave lauric acid. Two cautions on reading that across to argan, and they cut in argan's favour. Kanaar graded in words, not numbers, so there is no score to carry; and free oleic acid is not the same test material as oleic groups bound into a triglyceride, exactly the distinction that separates free lauric acid from the lauroyl groups in coconut oil. But the linoleic-acid hypothesis and the oleic-acid observation are pulling in opposite directions on the same oil, and neither was measured on argan. That is the real state of the evidence: two mechanistic arguments, no assay to adjudicate between them. The human literature on argan oil does not fill the gap either, and it is where the finished-formula error hides. The trials that exist tested creams containing argan oil alongside several other ingredients — a sebum-reduction study of a cream with argan, saw palmetto and sesame; a split-face study of a post-peel cream with argan, shea butter and a grain-wax extract; a diaper-dermatitis study. None isolated argan oil, and none counted comedone formation. A result about a formula is not a result about an ingredient. Safety data does not close the gap from the other side: the Cosmetic Ingredient Review's 2017 assessment of plant-derived fatty acid oils reviewed Argania spinosa kernel oil and concluded it safe as used, but that is a conclusion about irritation, sensitisation and toxicity, and safety is not comedogenicity. Finally, "argan oil" names a range rather than a fixed substance — its fatty-acid profile shifts with origin and processing — so even a single assay would only have spoken for the batch on the bench.

Where you’ll see it

Argan oil is sold as a standalone face and hair oil and is a common ingredient in facial oils, serums, night creams, "barrier" and anti-ageing moisturisers, lip and cuticle treatments, and a large share of hair oils, masks and leave-in conditioners. On a label it reads as Argania Spinosa Kernel Oil, and its hydrogenated form as Hydrogenated Argania Spinosa Kernel Oil, which is a different, more solid material. Where it sits in an ingredient list is not a comedogenicity signal, and there is no measured number to read off its position in any case.

Sources

Each source says what it actually is. Several widely-cited “sources” for comedogenic ratings are republishing the same 1989 assay, and counting them as independent agreement is how a thin evidence base gets made to look thick.

  1. Fulton JE. "Comedogenicity and irritancy of commonly used ingredients in skin care products." J Soc Cosmet Chem 40:321–333 (1989) The rabbit-ear survey most online comedogenic numbers descend from. Method: ingredient diluted to roughly 10% in propylene glycol, applied to the inner ear of New Zealand albino rabbits, three rabbits per assay, follicles scored for keratosis on a 0–5 scale whose own key reads 0–1 "not considered significant," 2–3 "borderline," 4–5 "considered positive." Read here off a 400dpi render of the journal scan rather than through a list quoting it. Cited purely for an absence: its 220 rows contain no argan or Argania entry, and its oils section — headed "VI. Oils*," the asterisk meaning "results depend on source of raw material" — does not include it. Fulton called the survey "not at all definitive." It supports no rating of argan oil in either direction.
  2. Morris WE, Kwan SC. "Use of the rabbit ear model in evaluating the comedogenic potential of cosmetic ingredients." J Soc Cosmet Chem 34:215–225 (1983) An independent laboratory's rabbit-ear assay on the same 0–5 scale, three rabbits, fourteen applications, graded microscopically. It predates Fulton 1989 and contradicts it in print on several materials, so it is not a republisher of him. Its thirty-two test materials are seven lanolins, nine vegetable oils, eleven esters and five surfactants. Cited for an absence: argan oil is not among the nine oils, nor anywhere in the paper.
  3. Fulton JE Jr, Pay SR, Fulton JE III. "Comedogenicity of current therapeutic products, cosmetics, and ingredients in the rabbit ear." J Am Acad Dermatol 10(1):96–105 (1984) Fulton's earlier rabbit-ear survey, read in full off the journal scan. Two New Zealand albino rabbits per test, one ear dosed daily for two weeks, the alternate ear as control, on a 0–5 scale whose key differs from his 1989 one — there, 1 to 2 is not significant and 3 or above is considered positive. Cited for an absence: it has no argan or Argania row, in either its therapeutic-product tables or its ingredient tables. It supports no rating of argan oil in either direction.
  4. Nguyen SH, Dang TP, Maibach HI. "Comedogenicity in rabbit: some cosmetic ingredients/vehicles." Cutan Ocul Toxicol 26(4):287–292 (2007) A later rabbit-ear assay on a 0–4 scale; abstract read via EuropePMC, full text and per-material scores not read, so no number is carried from it. Cited for an absence: the abstract names its fourteen test materials — all esters, alcohols, a sulfate and petrolatum — and argan oil is not among them.
  5. Bučar Miklavčič M, et al. "Fatty acid, sterol and tocopherol composition of Moroccan argan oil." Molecules 25(17):4080 (2020). PMID 32906680 A compositional analysis of cosmetic (unroasted-kernel) argan oil, not a comedogenicity study. Cited only for the fatty-acid figures quoted above — oleic 46.6%, linoleic 32.6%, palmitic 13.1% — which are the cosmetic-grade counterpart to the Algerian culinary profile also cited here. What it cannot support: anything about pores. Composition feeds an inference, not a measurement.
  6. Downing DT, Stewart ME, Wertz PW, Strauss JS. "Essential fatty acids and acne." J Am Acad Dermatol 14(2 Pt 1):221–225 (1986) The paper behind the "linoleic-acid" story. It reports that acne patients have lower linoleic acid in their skin-surface lipids and hypothesises that low follicular linoleate imposes a local essential-fatty-acid deficiency that drives the hyperkeratosis of comedone formation. Cited as the origin of the mechanistic argument used to call high-linoleic oils "acne-safe," and cited for what it is: a hypothesis about sebum composition, not a comedogenicity test, and not a study of argan oil or of any topical oil.
  7. Kanaar P. "Follicular-keratogenic properties of fatty acids in the external ear canal of the rabbit." Dermatologica 142(1):14–22 (1971) An early rabbit study, in the external ear canal rather than the ear surface, grading in words rather than numbers — there is no score to convert. Abstract read verbatim via EuropePMC; full text not read. Cited for the inconvenient half of the mechanism: free oleic acid, the single largest fatty acid in argan oil, produced "marked inflammation and follicular keratosis" here, the same verbal grade as lauric acid. Weighed with two limits that favour argan — the grade is qualitative, and free oleic acid is a different test material from oleic groups bound in a triglyceride.
  8. Cheikhousman R, et al. (Chimi H group). "Fatty acid, triglyceride and tocopherol composition of Algerian Argan (Argania spinosa) fruit seed lipids." Mediterr J Nutr Metab 2:181–187 (2009) A compositional analysis, not a comedogenicity study. Cited only for the fatty-acid and tocopherol profile of one argan sample — oleic 52.9%, linoleic 25.0%, palmitic 14.7%, stearic 7.1%, tocopherols ~637 mg/kg — which establishes that argan is a triglyceride oil, oleic-acid dominant with substantial linoleic acid. It says nothing about pores; the composition only feeds the structure-activity inference, which is not a measurement.
  9. Cosmetic Ingredient Review Expert Panel. "Safety Assessment of Plant-Derived Fatty Acid Oils as Used in Cosmetics." Int J Toxicol 36(3 suppl):51S–129S (2017) The industry expert-panel safety dossier covering 244 plant-derived fatty acid oils, including Argania spinosa kernel oil and its hydrogenated form. Concluded these oils are safe as used, based on food-use history, composition, and an absence of dermal irritation or sensitisation. Cited for identity and document state only: it is a SAFETY conclusion — irritation, sensitisation, toxicity — and we identified no comedogenicity data for argan oil in it. A safety conclusion is not evidence of noncomedogenicity.
  10. acne.org — "What is comedogenicity, and what ingredients are comedogenic? The full story" A republisher of the legacy assays, but a thorough one: it describes eleven published comedogenicity studies from 1972 to 2009 with their methods, combined under its own multi-study rule rather than by quoting one table. Not an independent measurement. Cited as an index of the literature — we found no argan oil entry in it, which is a statement about this document, not a claim that no study exists anywhere.
  11. Consumer comedogenic checkers and ingredient databases (CosDNA, incidecoder and similar) Aggregators that publish a 0–5 "acne" number per ingredient with no disclosed method, provenance or citation. Argan oil is listed at 0 on scale pages of this kind. Cited as the artefact being corrected, not as a measurement: we traced no primary assay behind that 0, and it is not carried as our legacy value.

Others in the same family

Oils behave similarly enough that the evidence for one is often wrongly read across to the others. These are its structural relatives, not a guess. What the evidence says about oils as a family ›

Last reviewed 2026-08-05 · How we decide

‹ Check a full ingredient list