our whitening teeth powder adopts nano-powder formulation technology, directionl synthesis production technology, does not contain water and emulsifier, completely maintains the efficacy of ingredients, and can be removed after long-term use-tobacco tea starins, betel nut stains, coffee stains, yellow and black strains, dental plaque and other problems. It's cleaning effect completely sruipasses toothpaste and can replace toothpaste products for daily cleaning.