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Head-to-head evidence comparison — which supplement is right for you?
Niacinamide 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 Niacinamide and Tranexamic Acid (topical) have evidence — compare verdict strength side-by-side.
Topical cosmetic only. Niacinamide is typically formulated at 2-5% in leave-on serums, creams, or gels and applied to clean skin once or twice daily (AM and/or PM). It layers well under sunscreen and with most other actives. There is no oral, injectable, or systemic dose in this cosmetic context — it is not ingested here. This library does not provide an ingestion protocol.
any
Leave-on topical serum or cream (2-5% niacinamide)
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
4-12 weeks
2-12 weeks
2-8 weeks
Throughout
8-12 weeks
Throughout
Throughout
Niacinamide: A B vitamin that improves aging facial skin appearance.
Dermatol Surg (2005) · Rct · n=50
Double-blind, left-right randomized split-face design: 5% niacinamide vs vehicle applied twice daily for 12 weeks in 50 white women with facial photoaging
The effect of niacinamide on reducing cutaneous pigmentation and suppression of melanosome transfer.
Br J Dermatol (2002) · Rct · n=18
Paired clinical trial: 18 subjects with hyperpigmentation used 5% niacinamide vs vehicle moisturizer (plus a separate facial-tanning arm)
A Double-Blind, Randomized Clinical Trial of Niacinamide 4% versus Hydroquinone 4% in the Treatment of Melasma.
Dermatol Res Pract (2011) · Rct · n=27
Split-face RCT in 27 melasma patients: 4% niacinamide vs 4% hydroquinone (HQ) for 8 weeks, both with sunscreen
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
Niacinamide has a higher evidence score (6/10 vs 6/10) and wins in 1 of 3 categories.
For even skin tone, Niacinamide has a higher relevance score (75 vs 70).
No known interactions between Niacinamide and Tranexamic Acid (topical) have been documented in our database. However, always consult a healthcare provider before combining supplements.