Benzoyl Peroxide Benzoyl Peroxide penetrates to reach bacteria in the pores where acne starts. ALL INGREDIENTS Active Ingredient: Benzoyl Peroxide 5% Inactive Ingredients: Benzyl benzoate, BHT, dicaprylyl ether, dimethyl isosorbide, disodium EDTA, hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer, phenoxyethanol, polysorbate 60, propylene glycol, squalane