The  prescription-quality, intensive acne treatment that has been extensively tried and tested at Kate Somerville’s clinic contains encapsulated Benzoyl Peroxide 5.0%, the most advanced and successful acne-fighting ingredient on the market. • The controlled release formula works around-the-clock without overdrying skin like traditional Benzoyl Peroxide formulations. • It kills bacteria and treats inflamed breakouts, while helping to prevent future acne. • REGU®SEB regulates the excess oil production, also effectively reducing future breakouts. •