BPO Rx. Blemish Complex is a paraben-free benzoyl peroxide (no PEGS) formulation. Offering a soothing, natural alternative, this BPO formula is mixed with a combination of allantoin, aloe vera and a special crossploymer blend to further enhance its calming and anti-inflammatory properties. With sebum-reducing support, acne marks appear diminished. A powerful BPO blend that will protect the skin while providing just the right balance of hydration.