Brand from Japan: Sunstar. Two vitamins penetrate gum cells, strengthening them from the inside and preventing periodontal disease.For those who feel their gums are starting to weaken, vitamin B6 revitalizes them.Vitamin En promotes blood circulation in the gums, strengthening their defenses. Contains a maximum fluoride concentration of 1450 ppm.How to use:Apply an appropriate amount to your toothbrush and brush your teeth thoroughly with gentle, small strokes.