Benzac is fast and effective treatment for Acne. Clinical trials have shown that it begins to fight the bacterial infection within 48 hours of commencing treatment and is proven to reduce the bacteria by 94%. Benzac AC is a water based benzoyl peroxide treatment for mild to moderate acne. Benzac AC absorbs excess oil, kills bacteria and does not excessively dry skin.Benzac AC offers the convenience and flexibility of multiple strengths.The difference ‘AC’ makes Benzac AC products contain an Acrylates Copolymer / glycerin complex. Acrylates Copolymer are tiny highly porous beads. These beads are so porous that they can absorb up to four times their own weight in fluid. Acrylates Copolymer beads soak up certain liquids quickly and easily, but they are selective about what they can absorb. They can rapidly absorb oils, however, they can’t absorb water because water has a very high surface tension.The other AC ingredient is glycerin. This lubricates the skin, imparting a feeling of smoothness and softness. effective treatment.