… and efficacy of niosomal and conventional tranexamic acid/niacinamide vs. hydroquinone creams in melasma: A randomized, double-blind, case-controlled clinical …
randomized, double-blind
EVIDENCE COMPARISON
SupportiveEarly or indirect evidence suggests niacinamide and lotus sprout extract show equal effectiveness for reducing pigmentation and improving skin tone, based on indirect comparison.
Effect ratio
Favored
Studies
Comparison
Limits: Indirect comparison · Mixed endpoint quality
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.
Some study-specific context may affect how broadly this comparison generalizes.