A Randomized, Double-Blind, Split-Face Study of Topical Silymarin vs 2% Hydroquinone Cream in Melasmas.
randomized, double-blind, split-face
EVIDENCE COMPARISON
DirectionalEarly or indirect evidence suggests clobetasol may reduce pigmentation 1.7 times more effectively than silymarin for improving skin tone, based on indirect comparison.
Effect ratio
Favored
Studies
Comparison
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.
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.