30 Years of Dark Spot Brightening Expertise in One Bottle Dr. Murad's next generation of powerhouse brightening ingredients take on the look of the most stubborn dark spots while treating your skin with the same care that a dermatologist would.This transformative, daily use serum goes one step beyond correction with antioxidant resorcinol that helps prevent the look of dark spots for more even tone in the future. Glycolic acid,one of the first and most sought-after exfoliants in Dr. Murad’s dermatology practice, removes dulling surface cells to quickly enhance natural radiance, penetration and performance of ingredients for better results. Results: 84 percent showed a reduction in the look of dark spots in 14 days Clinically proven results via instrumental measurement of areas with dark spots. With Murad regimen. Test panelists agree in just 14 days: 91 percent saw brighter skin 94 percent noticed smoother skin 89 percent reported a more radiant glow With Murad regimen.