Glycolic Acid vs Mandelic Acid
Which is right for your skin?
Glycolic gives faster, deeper resurfacing; mandelic acid's larger molecule exfoliates more gently — kinder to sensitive skin and deeper skin tones. Mandelic to start, glycolic for stronger results.
Exfoliates the surface of your skin to smooth rough texture and fade dullness. The strongest of the AHAs, so start slow.
The slowest, gentlest exfoliating acid. Resurfaces with the least irritation, especially friendly to sensitive and deeper skin tones.
Can you use Glycolic Acid and Mandelic Acid together?
Yes — Glycolic Acid and Mandelic Acid are documented to pair well together.
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 exfoliating. The slowest, gentlest exfoliating acid. Resurfaces with the least irritation, especially friendly to sensitive and deeper skin tones.
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
Ravikumar P et al., Efficacy of Alpha and Beta Hydroxy Acid Chemical Peels in Postacne Pigmentation, Journal of Clinical and Aesthetic Dermatology 2022 — mandelic-acid-containing peels improved postacne hyperpigmentation in a randomized comparison
Dayal S et al., Comparative study of efficacy and safety of 45% mandelic acid versus 30% salicylic acid peels in mild-to-moderate acne vulgaris, Journal of Cosmetic Dermatology 2020 — 45% mandelic acid peels comparably effective and better tolerated than 30% salicylic peels
Sarkar R et al., Comparative study of 35% glycolic acid, 20% salicylic-10% mandelic acid, and phytic acid combination peels in the treatment of active acne, Journal of Cutaneous and Aesthetic Surgery 2019;12(3):158-163
Jacobs SW, Culbertson EJ, Effects of Topical Mandelic Acid Treatment on Facial Skin Viscoelasticity, Facial Plastic Surgery 2018;34(6):651-656 — twice-daily topical mandelic acid for 4 weeks increased lower-eyelid skin elasticity by 25.4%
Kontochristopoulos G, Platsidaki E (Greece), Chemical peels in active acne and acne scars, Clinics in Dermatology 2017;35(2):179-182 — review supporting mandelic-acid-containing peels for active acne and acne scarring
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 — salicylic-mandelic combination peels equally efficacious to 35% glycolic in 90 Indian melasma patients
Every entry points to a specific paper or regulatory document. See methodology for what each outcome label means.