Reza Kafi,Heh Shin R. Kwak,Wendy E. Schumacher,Soyun Cho,Valerie N. Hanft,Ted Hamilton,Anya L. King,Jacqueline D. Neal,James Varani,Gary J. Fisher,John J. Voorhees,Sewon Kang
Objective: To evaluate the effectiveness of topical retinol (vitamin A) in improving the clinical signs of naturally aged skin.Design: Randomized, double-blind, vehicle-controlled, left and