Our Teeth Brightening Repair Pen contains propolis, orange peel extract, and tea tree oil.It cleans tartar, removes yellow stains, freshens breath and brightens teeth.It is easy to use: brush and clean your teeth before use, then apply the gel evenly on the surface of your teeth. avoid eating or drinking for 30 minutes, and finally rinse your mouth with water.It effectively removes yellow tooth stains from cigarettes, tea and coffee, solves the problem of yellow teeth and freshens your breath, thus keeping your teeth healthy.