If your skin has successfully built a tolerance through the use of Retinol 0.5, this maximum-strength, 1.0% pure retinol treatment is your next step. Engineered with sophisticated time-release technology, it delivers a steady, concentrated dose of retinol directly to the skin. This formulation is an intensive solution for severely sun-damaged or acne-prone complexions, clinically proven to overhaul skin texture by drastically reducing deep-set wrinkles, stubborn dark spots, enlarged pores, and frequent breakouts.