Retinol Youth Renewal Serum Travel Size The #1 Retinol product in the U.S. is now available in a travel size! Murad has perfected the science of retinol with this breakthrough serum, powered by Retinol Tri-Active Technology: a fast-acting retinoid, a time-released retinol and a retinol booster. This potent yet gentle formula quickly and visibly minimizes lines and deep wrinkles, firms, evens skin tone and boosts radiance for more vibrant, youthful-looking skin. Which skin type is it good for? - Normal - Oily - Combination - Dry - Sensitive