The main function of mouthwash is to freshen the breath. The advantage of using mouthwash is that it can not only prevent bad breath, make the mouth clean and comfortable, but also wash away the food residues attached to the tooth surface after meals that have not been fermented by bacteria, reducing the chance of dental disease.

According to the function of mouthwash, functional additives include antibacterial agents, astringents, anti caries agents, anti plaque and gingivitis compounds, anti-inflammatory agents, desensitizers, deodorants, etc.