A comparative study of 20% azelaic acid cream versus 5% tranexamic acid solution for the treatment of postinflammatory hyperpigmentation in patients with acne vulgaris: A single-blinded randomized clinical trial.
controlled
EVIDENCE COMPARISON
DirectionalVitamin C (L-Ascorbic Acid)
vs Azelaic Acid
for Pigmentation Reduction
Early or indirect evidence suggests vitamin C and azelaic acid show similar effectiveness for reducing pigmentation and improving skin tone, based on indirect comparison.
1.00x
Effect ratio
Neither
Favored
4
Studies
Indirect
Comparison
ExploratorySubjective endpointTone
Limits: Indirect comparison · Includes subjective endpoint · Early-stage evidence tier
This is an indirect comparison — the two ingredients were not tested head-to-head in the same trial. The ratio is derived from separate studies against a common comparator.
How to read this claim
Kept public as exploratory because it indirect comparison; includes subjective endpoint; early-stage evidence tier.
Some study-specific context may affect how broadly this comparison generalizes.
Source Studies (4)
Comparing the efficacy of Myjet‐assisted tranexamic acid and vitamin C in treating melasma: A split‐face controlled trial
randomized, double-blind, split-face
Topical Tranexamic Acid Versus Topical Vitamin C With Microneedling in Periorbital Hyperpigmentation; Comparative Study
controlledn=60
Fractional carbon dioxide laser assisted delivery of tranexamic acid versus ascorbic acid in the treatment of melasma: a split face comparative study with digital skin analysis.
controlled