Tretinoin and Retinol Bioactivity are Retained when Layered with Adjunctive Gel-Matrix Moisturizer or a Cream Moisturizer in an “Open Sandwich” Regimen

Authors: Ramine Parsa, Wen-Hwa Li, Ruchi Patel, Astik Risal, Katrina Bernhardt, Ashleigh Murtaugh-Frey, Star Walsh, Nikoleta Batchvarova, Barbara Green, Asha Patel Shah

Presented at the American Academy of Dermatology Annual Meeting March 7-11, 2025