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Head-to-head evidence comparison — which supplement is right for you?
Tranexamic Acid (topical) wins 1 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Mostly mechanism / observational
Top outcomes
Verdict
Mostly mechanism / observational
Top outcomes
Shared outcomes (1)
Outcomes where both Alpha-Arbutin and Tranexamic Acid (topical) have evidence — compare verdict strength side-by-side.
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 use, typically ~2-5% tranexamic acid in a serum applied to areas of melasma once or twice daily, alongside daily sunscreen. There is no oral or systemic dose in this cosmetic context — the ingested medication is a separate prescription use with clotting-risk considerations. This library does not provide an ingestion protocol.
any
Leave-on topical serum (≈2-5% tranexamic acid)
Throughout
8-12 weeks
Throughout
Throughout
Throughout
8-12 weeks
Throughout
Throughout
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
Topical tranexamic acid as a promising treatment for melasma.
J Res Med Sci (2014) · Rct · n=50
Double-blind 12-week split-face RCT in 50 women: 3% topical TXA on one side vs 3% hydroquinone + 0.01% dexamethasone on the other, twice daily
The effectiveness and safety of 3% tranexamic acid cream vs. 4% hydroquinone cream for mixed-type melasma in skin of color: a double-blind, split-face, randomized controlled trial.
Acta Dermatovenerol Alp Pannonica Adriat (2024) · Rct · n=20
Double-blind 8-week split-face RCT in 20 skin-of-color subjects comparing 3% topical TXA cream vs 4% hydroquinone cream
Tranexamic acid as a therapeutic option for melasma management: meta-analysis and systematic review of randomized controlled trials.
J Dermatolog Treat (2024) · Meta analysis
Meta-analysis of 22 RCTs (1280 patients) of TXA delivered orally, topically, or by injection for melasma
Tranexamic Acid (topical) has a higher evidence score (6/10 vs 4/10) and wins in 1 of 3 categories.
For even skin tone, Tranexamic Acid (topical) has a higher relevance score (70 vs 60).
No known interactions between Alpha-Arbutin and Tranexamic Acid (topical) have been documented in our database. However, always consult a healthcare provider before combining supplements.