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EVIDENCE COMPARISON

Directional

Azelaic Acid
vs Silymarin
for Pigmentation Reduction

Early or indirect evidence suggests azelaic acid may reduce pigmentation 1.38 times more effectively than silymarin for improving skin tone, based on indirect comparison.

1.38x

Effect ratio

Azelaic Acid

Favored

3

Studies

Indirect

Comparison

ExploratoryMixed endpointsTone

Limits: Indirect comparison · Mixed endpoint quality · 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; mixed endpoint quality; early-stage evidence tier.

Some study-specific context may affect how broadly this comparison generalizes.

1 linked trialIngredient trial

Source Studies (3)

Azelaic Acid Versus Hydroquinone for Managing Patients With Melasma: Systematic Review and Meta-Analysis of Randomized Controlled Trials.

controlled
DOIPubMed

A Randomized, Double-Blind, Split-Face Study of Topical Silymarin vs 2% Hydroquinone Cream in Melasmas.

randomized, double-blind, split-face
DOIPubMed

A Randomized, Double-Blind, Split-Face Study of Topical Silymarin vs 2% Hydroquinone Cream in Melasmas.

randomized, double-blind, split-face
DOIPubMed
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