Combination Superficial Peels With Salicylic Acid and Post-Peel Retinoids.
double-blind, split-face
EVIDENCE COMPARISON
Gold StandardRetinol
vs Tretinoin
for Surface Smoothness
Studies show retinol improved skin surface smoothness 1.09 times more than tretinoin for texture enhancement.
1.09x
Effect ratio
Retinol
Favored
2
Studies
Direct
Comparison
Texture
How to read this claim
Direct comparison with enough study context for public-facing comparative wording, with limits noted for mixed endpoint quality.
The published evidence does not currently show a major generalization warning beyond the listed study limits.
1 linked trialIngredient trial
Source Studies (2)
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