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Head-to-head evidence comparison — which supplement is right for you?
Alpha-Arbutin and Glycolic Acid are closely matched across evidence, studies, and safety.
Verdict
Mostly mechanism / observational
Top outcomes
Verdict
Mostly mechanism / observational
Top outcomes
Topical cosmetic only. Alpha-arbutin is typically used at roughly 1-2% in leave-on serums, applied to areas of hyperpigmentation once or twice daily, usually alongside daily sunscreen and often with other brighteners. There is no oral, injectable, or systemic dose — it is not ingested. This library does not provide an ingestion protocol.
any
Leave-on topical serum (≈1-2% alpha-arbutin)
Topical cosmetic only. Leave-on glycolic acid is used at roughly 5-15% in lotions/serums (often at low pH), applied to clean skin a few nights per week and building as tolerated; professional peels (20-70%) are applied in-office at intervals. There is no oral, injectable, or systemic dose — it is not ingested. Pair with daily sunscreen. This library does not provide an ingestion protocol.
evening
Leave-on lotion or serum (≈5-15% glycolic acid)
Throughout
8-12 weeks
Throughout
Throughout
Throughout
8-12 weeks
8-16 weeks
First weeks
The Efficacy of Topical Cosmetic Containing Alpha-Arbutin 5% and Kojic Acid 2% Compared With Triple Combination Cream for the Treatment of Melasma: A Split-Face, Evaluator-Blinded Randomized Pilot Study.
J Cosmet Dermatol (2025) · Rct · n=30
Split-face, evaluator-blinded randomized pilot in 30 melasma patients: alpha-arbutin 5% + kojic acid 2% vs triple-combination cream over 12 weeks
Efficacy and Safety of a Topical Formulation Containing Trihydroxybenzoic Acid Glucoside and α-Arbutin, Applied Along With a Sunscreen: A Noncomparative, Prospective, Interventional Study in Indian Females With Facial Melasma or Dark Spots.
J Cosmet Dermatol (2025) · Open label · n=124
Open-label, single-arm 90-day study in 124 Indian women using alpha-arbutin 2% + trihydroxybenzoic acid glucoside twice daily plus once-daily sunscreen
Inhibitory effects of alpha-arbutin on melanin synthesis in cultured human melanoma cells and a three-dimensional human skin model.
Biol Pharm Bull (2004) · In vitro
Foundational mechanism study: alpha-arbutin reduced melanin synthesis in cultured human melanoma cells (to 76% at 0.5 mM) and to 40% of control in a 3D human skin model
A double-blind randomized clinical trial on the effectiveness of a daily glycolic acid 5% formulation in the treatment of photoaging.
Dermatol Surg (1998) · Rct · n=75
75 volunteers applied 5% unneutralized glycolic acid cream or placebo to face and neck daily for 3 months (double-blind, randomized, placebo-controlled)
Clinical improvement of photoaged skin with 50% glycolic acid. A double-blind vehicle-controlled study.
Dermatol Surg (1996) · Rct · n=41
41 volunteers received a 50% glycolic acid peel vs vehicle weekly for 4 weeks (in-office peel strength)
Mode of action of glycolic acid on human stratum corneum: ultrastructural and functional evaluation of the epidermal barrier.
Arch Dermatol Res (1997) · Open label
Electron-microscopy study of human skin after 3 weeks of 4% glycolic acid twice daily
Both Alpha-Arbutin and Glycolic Acid are closely matched — the best choice depends on your specific health goals.
Both Alpha-Arbutin and Glycolic Acid score equally (60) for even skin tone.
No known interactions between Alpha-Arbutin and Glycolic Acid have been documented in our database. However, always consult a healthcare provider before combining supplements.