Advanced enamel protection, repair remineralization Natural ingredients repair: hydroxyapatite is the main ingredient of tooth enamel, which can mimic the structure of tooth enamel, fill the tiny holes and scratches on the surface of the teeth, repair early demineralization damages, enhance the hardness of the teeth, and resist the erosion of acidic substances. Formation of protective layer: It adheres to the surface of the teeth to form a protective film, which reduces the wear and tear of enamel by external stimuli and prevents further development of dental caries. The formula is mild and fluoride-free, suitable for sensitive teeth Fluoride-free and safer: no fluoride, avoiding the risk of excessive fluoride intake, suitable for children, pregnant women and people who are sensitive to fluoride. Mild and non-irritating: Friction particles are fine and mild, not easy to wear down tooth enamel when cleaning teeth and relieve dentin sensitivity, suitable for sensitive teeth. Anti-bacterial freshness, improve oral environment Inhibit bacterial growth: hydroxyapatite can adsorb harmful bacteria in the oral cavity, regulate the micro-ecological environment of the oral cavity, inhibit the growth of caries-causing bacteria and reduce the formation of dental plaque. Fresh Breath: Removes bad breath odor, keeps breath fresh and improves the experience of using it.