A Randomized, Double-blind, Split-face Study Comparing the Efficacy and Tolerability of Three Retinol-based Products vs. Three Tretinoin-based Products in Subjects With Moderate to Severe Facial Photodamage.
randomized, double-blind, split-face
EVIDENCE COMPARISON
Gold StandardRetinol
vs Tretinoin
for Tone Evenness
Studies show retinol and tretinoin perform equally for improving skin tone evenness in direct clinical comparison.
1.00x
Effect ratio
Neither
Favored
1
Study
Direct
Comparison
Tone
How to read this claim
Direct comparison with enough study context for public-facing comparative wording.
The published evidence does not currently show a major generalization warning beyond the listed study limits.
1 linked trialIngredient trial