For the coming season, use it daily to prevent hay fever with a gargle. For the prevention of periodontal disease and bad breath. For the prevention of influenza and coronavirus. This is a truly wonderful product. KshKsh Mouthwash, the highest grade, born for professionals. It is unflavored, unscented, and non-irritating, with safety that is extremely close to water. By adopting the higher concentration of MA-T System® than other similar products, it can be used by anyone, and can care for those sensitive to irritation and fragrance. It is truly a mouthwash for professionals.