Benzoyl Peroxide vs Salicylic Acid
Which is right for your skin?
Benzoyl peroxide kills acne bacteria (red, inflamed pimples); salicylic acid clears oil from pores (blackheads, whiteheads). Many routines use both, just not at the same moment.
Kills the bacteria that cause inflammatory acne. The first thing to reach for when you have red, painful pimples.
Goes into your pores and dissolves the oil and dead skin clogging them. Best for blackheads, whiteheads, and oily, acne-prone skin.
Can you use Benzoyl Peroxide and Salicylic Acid together?
Yes, Benzoyl Peroxide and Salicylic Acid are documented to pair well together.
You want anti-acne. Kills the bacteria that cause inflammatory acne. The first thing to reach for when you have red, painful pimples.
You want anti-acne, exfoliating. Goes into your pores and dissolves the oil and dead skin clogging them. Best for blackheads, whiteheads, and oily, acne-prone skin.
Cited research
Barbieri JS et al. Benzoyl Peroxide-Containing Products and Benzene: Where Are We Now After Recalls, and How Should We Move Forward? JAMA Dermatology. 2025;161(8). doi:10.1001/jamadermatol.2025.1694 — Viewpoint examining benzene formation risk in benzoyl peroxide products following product recalls; discusses monitoring and regulatory considerations for BPO safety.
Barbieri JS et al. The Role of Formulation in Benzene Formation in Benzoyl Peroxide Products. JAMA Dermatology. 2025;161(4). doi:10.1001/jamadermatol.2024.6443 — Quality improvement study examining how OTC benzoyl peroxide product formulation characteristics affect detected benzene concentration levels.
Huang CY et al., Comparative Efficacy of Pharmacological Treatments for Acne Vulgaris: A Network Meta-Analysis of 221 Randomized Controlled Trials, Annals of Family Medicine 2023;21(4):358-369 — BPO combinations among most effective topical regimens for acne
Stein Gold L et al., Efficacy and Safety of a Fixed-Dose Clindamycin Phosphate 1.2%, Benzoyl Peroxide 3.1%, and Adapalene 0.15% Gel for Moderate-to-Severe Acne: A Randomized Phase II Study of the First Triple-Combination Drug, American Journal of Clinical Dermatology 2022;23(1):93-104 — triple-combination gel superior to vehicle and dyad comparators
Yang Z et al., Topical benzoyl peroxide for acne, Cochrane Database of Systematic Reviews 2020;3:CD011154 — BPO modestly more effective than placebo, low-certainty evidence
U.S. FDA. 21 CFR § 333.310 — Acne active ingredients. Benzoyl peroxide listed as GRASE at 2.5 to 10 percent. Codified under OTC Monograph M006 (Final Administrative Order OTC000013), effective March 27, 2020.
Effects of adapalene-benzoyl peroxide combination gel in treatment or maintenance therapy of moderate or severe acne vulgaris: a meta-analysis, Annals of Dermatology 2014;26(1):43-52 — A-BPO combination yields better clinical outcomes vs vehicle gel
Liu Y et al., Clinical Efficacy of a Salicylic Acid-Containing Gel on Acne Management and Skin Barrier Function: A 21-Day Prospective Study, Journal of Cosmetic Dermatology 2025;24(7):e70353 — salicylic acid gel reduced acne lesions, regulated sebum, improved hydration and barrier function
Ye R et al., 2% supramolecular salicylic acid hydrogel vs. adapalene gel in mild to moderate acne vulgaris: multicenter, randomized, evaluator-blind, parallel-controlled trial, Journal of Cosmetic Dermatology 2024;23(6):2125-2134 — 2% SSA hydrogel was equally effective as adapalene gel for mild-to-moderate acne
Brumley C et al. Allergic contact dermatitis to salicylic acid: A case series of relevant sensitization. Contact Dermatitis. 2024;91(2):133-138. doi:10.1111/cod.14573 — Case series of 489 patch-tested patients (2020-2024): 21 positive reactions to salicylic acid. Documents that ACD to SA is likely underreported; testing at 5% concentration feasible.
Scientific Committee on Consumer Safety (SCCS). Opinion on Salicylic Acid (CAS No. 69-72-7). SCCS/1646/22. Preliminary opinion December 14, 2022; Final opinion adopted June 6-7, 2023. Evaluates safety of salicylic acid in cosmetic products including preservative and non-preservative uses across leave-on and rinse-off product categories.
Liu H et al., Topical azelaic acid, salicylic acid, nicotinamide, sulphur, zinc and fruit acid for acne, Cochrane Database of Systematic Reviews 2020;5:CD011368 — conclusion: clinical benefit is unclear
MFDS Approved Functional Cosmetic Active — Salicylic Acid (anti-acne). Korean Ministry of Food and Drug Safety, Cosmetic Functional Active Ingredient List — the sole approved anti-acne functional cosmetic active in the Korean Functional Cosmetics Codex
CIR Amended Safety Assessment of Salicylic Acid and Salicylates as Used in Cosmetics (Johnson et al.), final amended report April 2019
SCCS Opinion on the safety of cosmetic ingredient salicylic acid (CAS 69-72-7) - Submission I, SCCS/1601/18, final version 21 December 2018
Arif T, Salicylic acid as a peeling agent: a comprehensive review, Clinical, Cosmetic and Investigational Dermatology 2015;8:455-61
Every entry points to a specific paper or regulatory document. See methodology for what each outcome label means.