World-renowned dermatologist Dr Andrew Markey collaborated with us to create this powerful, graduation-level Double-Retinol™ Serum. With a Youthbomb™ Retinol Retinoid Complex for exceptionally effective resurfacing and collagen-support. Includes Niacinamide, Lactic Acid, Fi-Vita, Allosteris, Hyaluronic Acid and Concentrated Ceramides. If you’re already using Retinol, introduce this advanced serum twice a week at first and prepare to be wowed.