Glycolic Acid vs Salicylic Acid
Which is right for your skin?
The classic AHA vs BHA: glycolic acid resurfaces the skin's surface for tone and texture; salicylic acid gets inside oily pores. Dry or dull skin → glycolic; oily or acne-prone → salicylic.
Exfoliates the surface of your skin to smooth rough texture and fade dullness. The strongest of the AHAs, so start slow.
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 Glycolic Acid and Salicylic Acid together?
Use with care: AHA + BHA stacking risks over-exfoliation. Use a pre-formulated AHA/BHA product or alternate days.
You want exfoliating. Exfoliates the surface of your skin to smooth rough texture and fade dullness. The strongest of the AHAs, so start slow.
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
Liu H et al., Topical agents for acne (covers AHA / fruit-acid arm), Cochrane Database of Systematic Reviews 2020;5:CD011368 — conclusion: clinical benefit is unclear
Sarkar R et al., Comparative Evaluation of Efficacy and Tolerability of Glycolic Acid, Salicylic-Mandelic Acid, and Phytic Acid Combination Peels in Melasma, Dermatologic Surgery 2016;42(3):384-391 — 35% glycolic acid and salicylic-mandelic peels equally effective and safe for melasma in Indian skin
Kubiak M et al., Evaluation of 70% glycolic peels versus 15% trichloroacetic peels for the treatment of photodamaged facial skin in aging women, Dermatologic Surgery 2014;40(8):883-891 — both peels improved photodamaged skin; glycolic acid showed faster hydration recovery
CIR Final Report on the Safety Assessment of Glycolic Acid and Lactic Acid, their salts and simple esters (Andersen FA), International Journal of Toxicology 1998;17(Suppl 1):1-241
Stiller MJ et al., Topical 8% glycolic acid and 8% L-lactic acid creams for the treatment of photodamaged skin. A double-blind vehicle-controlled clinical trial, Archives of Dermatology 1996;132(6):631-636 — 76% of glycolic acid users improved at least one grade vs 40% vehicle
Garcia A, Fulton JE Jr, The combination of glycolic acid and hydroquinone or kojic acid for the treatment of melasma and related conditions, Dermatologic Surgery 1996;22(5):443-447 — glycolic acid topical products highly effective in reducing melasma pigment
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.