What it is: A prescription-quality, intensive acne treatment that has been extensively tried and tested at Kate Somerville's clinic.What it does: This advanced formulation contains encapsulated benzoyl peroxide 5% and features a controlled-release formula that works around the clock without overdrying skin. It also helps kill bacteria and treat inflamed breakouts, while helping prevent future acne. How to use: Use morning and night, 1-3 times a day as needed. Apply a thin, even layer to clean, dry skin on affected areas then follow with your moisturizer and sunscreen. Reduce the frequency of use if excessive drying occurs. 1.7 oz. Cruelty-free