What is Retinol? Here, skin doctor David Khoo from Olay gives The Carousel his ultimate guide to Retinol. How does it work and how can it benefit your skin?T What is Retinol?   Retinol is a skincare ingredient that comes from Vitamin A. It is widely known and often recommended by dermatologists because of its well-proven, … Continue reading Olay Skin Doctor David Khoo’s Ultimate Guide To Retinol