Xylitol is a sweetener that occurs naturally. It can be found, for instance, in berries, fruit, vegetables and mushrooms. xylitol is not actually a sugar, but a sugar alcohol.Xylitol is an important supplement in the preventation of dental caries.Research suggests significant benefits to using xylitol as a nasal wash, in addition to its dental application. Bacteria become "sticky” and adhere to the surface of the teeth leading to dental caries. Similarly, when Streptococcus pneumoniae and other bacteria in the upper respiratory passages adhere to mucous membranes and nasal tissues, they can lead to infection and disease.
Xylitol , when used in a nasal wash, helps prevent bacteria from adhering and helps the body’s natural cleansing processes to clear away these harmful bacteria, reducing the risk of infection. Among others, an August 2000 study (Welsh, et al) concludes: "…our data suggest that xylitol delivered to the airway surface may enhance the innate antibacterial defense system."