It will color your teeth blue and you need to brush more thoroughly and lastingly, until you manage to remove the color completely.
MODE OF USE
Rinse with 10 ml for 30 seconds before brushing your teeth, look for blue spots and brush your teeth until removed.
CAUTIONS AND WARNINGS
Rinsing may stain textile garments or other materials. The stains will disappear after washing them with detergents. Its use is limited as a mouthwash. Stay out of reach and in the eyes of children. Do not use more than 2 times a day. Use under the supervision of an adult.