Is benzoyl peroxide comedogenic?
Short answer
Conflicting evidence: Conflicting or context-dependent evidenceThe 1984 rabbit ear assay flagged some benzoyl peroxide formulations as comedogenic and recommended they be reformulated — while benzoyl peroxide itself is a standard acne therapeutic. The signal was attached to particular finished formulations rather than to the active on its own, and it comes from an animal screening model later reported to overreact relative to human testing. This entry is not a reason to stop or change an acne treatment; that is a conversation for a healthcare professional.
Recorded as Benzoyl Peroxide · dataset record benzoyl-peroxide · reviewed 2026-08-06
What the evidence actually is
The material was applied to animal skin — in this dataset, a rabbit ear assay. It is a screening model, and the human-assay literature reports that it overreacts to comedogenic materials relative to human testing.
What the sources report
The cited rabbit ear assay identified some benzoyl peroxide formulations as comedogenic and suggested they be reformulated, even though benzoyl peroxide is itself a standard acne therapeutic. The signal was attached to the formulation rather than to the active alone.
What this does not cover
This is a strong illustration of why an ingredient match is not a product verdict: the cited concern applied to particular formulations of an ingredient used to treat the condition in question. Consult a healthcare professional about acne treatment rather than acting on this entry.
Why people ask about Benzoyl peroxide
It is the contradiction that brings people here: an ingredient sold specifically to clear acne turns up on comedogenic ingredient lists. Someone whose acne is not improving on benzoyl peroxide searches the ingredient, finds it flagged, and reasonably wonders whether the treatment is the cause. The lists rarely mention that the finding applied to specific vehicles rather than to the active.
Where the circulating rating for Benzoyl peroxide comes from
Where a number circulates for benzoyl peroxide it traces back to Fulton's 1984 rabbit ear work, which tested therapeutic products alongside cosmetics and ingredients. That study reported comedogenic behaviour in some benzoyl peroxide preparations and suggested reformulation. Two things get lost when the result is reduced to a rating: it described named products rather than the ingredient in isolation, and Draelos and DiNardo's 2006 human-assay work later reported that finished products built from ingredients previously identified as comedogenic are not necessarily comedogenic themselves. A rating carried forward from the first without the second is not a summary of the evidence.
Names Benzoyl peroxide appears under
Declared as Benzoyl Peroxide, sometimes shortened to BPO. It is a regulated acne drug active in many markets rather than a cosmetic ingredient, so it usually appears in a drug facts panel rather than an ingredient list. Concentration and vehicle vary widely between products, and the 1984 finding was specific to formulations, so two products at the same percentage are not interchangeable for this question.
Recognised in this dataset as Benzoyl Peroxide, and through the recorded aliases bpo, benzoylperoxide. Matching is exact: there is no fuzzy matching anywhere in this tool, so a name not listed here is reported as unrecognised rather than guessed at.
Questions about benzoyl peroxide
Can benzoyl peroxide cause the acne it is meant to treat?
Nothing reviewed here establishes that. The cited animal-model result reported comedogenic behaviour in some formulations, which is a finding about those preparations rather than a mechanism for the active causing acne. The American Academy of Dermatology's guidance on acne that is not clearing notes that even products labelled non-comedogenic can still cause acne in some people — which is a reason to raise it with a clinician, not a reason to read a verdict off an ingredient list.
Should I stop using benzoyl peroxide because of this?
This project does not make treatment recommendations and this page is not a basis for changing one. The evidence here is a 1984 animal screening result attached to particular formulations, weighed against benzoyl peroxide's established role as an acne therapeutic. If a treatment is not working, that is a question for the person who prescribed or recommended it.
Does the concern apply to every benzoyl peroxide product?
No. The cited assay identified particular formulations, and the 2006 human-assay work found that finished products containing ingredients flagged as comedogenic are not necessarily comedogenic. There is no basis in these sources for carrying a result from one product across to another simply because both contain the same active.
Sources cited on this page
These are the sources attached to this record. Nothing on this page is drawn from anything else.
Comedogenicity of current therapeutic products, cosmetics, and ingredients in the rabbit ear
Fulton JE Jr, Pay SR, Fulton JE 3rd. Journal of the American Academy of Dermatology, 1984. Peer-reviewed. doi:10.1016/s0190-9622(84)80050-x
Rabbit ear assay. This is the historical origin of most ingredient-level comedogenicity lists in circulation today. The assay is a screening model in animal skin, not a measurement of how a finished cosmetic behaves on a human face. Later work (see src-baek-2016) reports that this model overreacts relative to human testing.
A re-evaluation of the comedogenicity concept
Draelos ZD, DiNardo JC. Journal of the American Academy of Dermatology, 2006. Peer-reviewed. doi:10.1016/j.jaad.2005.11.1058
Applied a modification of the Mills and Kligman human assay to finished cosmetic products formulated with ingredients previously identified as comedogenic. Reported that finished products using comedogenic ingredients are not necessarily comedogenic. This is the single most important source in this dataset: it is the direct evidence that an ingredient-level match cannot be converted into a finished-product conclusion.
Acne: Why won't my acne clear?
American Academy of Dermatology Association, 2026. Professional body.
Consumer guidance from a dermatology professional body. Advises choosing products labelled non-comedogenic while also noting such products can still cause acne in some people. Cited for interpretation guidance, not for ingredient-level classification.
Record reviewed 2026-08-06 by pore-checker prototype dataset compilation (not clinically reviewed).