Evidence recordApplied to skin
Tranexamic Acid
Answer
One small vehicle-controlled trial found 5% topical tranexamic acid no better than its vehicle after 12 weeks and reported more redness.
Check the formulaEvidence grade
Limited
The record is early, small, indirect, mixed or tightly tied to one formulation.
Where it stops
The dedicated topical trial enrolled 23 women and 21 completed. A 22-trial review mixed topical, injected, and oral routes and had high heterogeneity. A separate 99-person study compared tranexamic-acid and niacinamide combination creams with 4% hydroquinone, so it did not isolate tranexamic acid or prove the formulas equivalent.
Sources
Sources · 3
Source 1
J Cosmet Laser Ther, 2012- Design
- Double-blind split-face trial
- Participants
- 23
- Duration
- 12 weeks
- Reported numbers
- 5%
- Measured outcome
- melanin index, melasma severity, erythema
- Studied formulation
- 5% topical tranexamic acid gel, vehicle gel
Finding
Double-blind 12-week split-face trial: 23 women enrolled and 21 completed. The 5% tranexamic acid side was neither superior nor different from vehicle for pigmentation, while erythema was significantly higher on the tranexamic-acid side.
Source 2
J Dermatolog Treat, 2024- Design
- Systematic review and meta-analysis of 22 randomized trials
- Participants
- 1280
- Measured outcome
- melasma severity, adverse effects
- Studied formulation
- oral tranexamic acid, injected tranexamic acid, topical tranexamic acid
Finding
Systematic review and meta-analysis of 22 randomised trials with 1,280 patients. Oral treatment showed the largest pooled MASI decrease, followed by injections and topical applications; studies had high heterogeneity, especially among combination treatments.
Source 3
Sci Rep, 2025- Design
- Randomized double-blind active-comparator trial
- Participants
- 99
- Reported numbers
- 4%
- Measured outcome
- melanin index, melasma severity, quality of life, adverse reactions, relapse
- Studied formulation
- 2% tranexamic acid with 2% niacinamide niosomal cream, 5% tranexamic acid with 4% niacinamide conventional cream, 4% hydroquinone cream
Finding
Randomised double-blind 99-person comparison of two tranexamic-acid and niacinamide combination creams with 4% hydroquinone. Because neither test cream isolated tranexamic acid and the comparator was active, the trial does not establish tranexamic acid alone or prove equivalence.