Combination Superficial Peels With Salicylic Acid and Post-Peel Retinoids.
double-blind, split-face
EVIDENCE COMPARISON
StrongEvidence suggests retinol and tretinoin provide equal redness reduction for improving skin tone.
Effect ratio
Favored
Study
Comparison
Tone
Direct comparison with enough study context for public-facing comparative wording, with limits noted for includes subjective endpoint.
The published evidence does not currently show a major generalization warning beyond the listed study limits.