In this pilot study, researchers wanted to find out if irrigating the sinuses with a water-xylitol solution would improve symptoms of people suffering from chronic rhinosinusitis. They concluded, “Xylitol irrigations result in greater improvement of symptoms of chronic rhinosinusitis as compared to saline irrigation.”
Weissman, J. D., et al. (2011). Xylitol nasal irrigation in the management of chronic rhinosinusitis: a pilot study. The Laryngoscope, 121(11), 2468–2472.