The DermaHarmony 10% Benzoyl Peroxide or BPO (non-soap) Cleansing Bar was especially formulated for those with acne. This bar is for use on mild to moderate acne. It may be used in combination with other acne treatments as directed by your doctor. When applied to the skin, benzoyl peroxide (BPO) works by reducing the amount of acne-causing bacteria and by causing the skin to dry and peel. Benzoyl peroxide works well for mild pustules. Size: Single 4 oz Bar Active Ingredient: 10% Benzoyl Peroxide (BPO) Inactive Ingredients: Sodium Cocoyl Isethionate (SCI), Stearic Acid, Coconut Fatty Acid, Sodium Isethionate, Water, Sodium Isethionate, Coco Glucoside, Cetearyl Alcohol Ceteareth-20, Lactic Acid Other Information: This product is not for use on broken skin or for internal use. In case of incidental ingestion, contact a physician or poison control center immediately. Rinse with water if solution comes into contact with eyes. BPO will bleach stain clothing and towels - use caution. It leaves funky orange stains on nearly everything it touches. Wash your hands well with soap and water after each application. Rinse your face and body extremely well before toweling off to prevent staining of fabrics.