PearlWhite Medicated Pearl White Pro EX+, 30ml[Easy to use at home teeth whitening serum] This unique triple whitening formula combines malic acid (alpha hydroxy acid), which is ideal for whitening, with the addition of metaphosphate and polyphosphate. IPMP penetrates and kills periodontal disease bacteria, while allantoin, a gum improving ingredient, helps whiten teeth and maintain healthy, pink gums with daily brushing.