However, the benefits of nattokinase are not limited to the cardiovascular system. A 2017 study by Fukui University in Japan found that nattokinase can improve chronic sinusitis, nasal polyp formation and asthma, and the effect is very powerful. Chronic rhinosinusitis doesn't respond very well to conventional drugs, but may respond to nattokinase, which is a breakthrough.
Long-term inflammation leads to excessive deposition of fibrin in the nasal mucosa, which is one of the factors that cause chronic sinusitis and also promotes the formation of nasal polyps. The results of Japanese scholars show that nattokinase can degrade fibrin, thereby effectively shrinking nasal polyp tissue. It was also found that the viscosity of nasal mucus and sputum of patients with chronic sinusitis and asthma, respectively, was significantly reduced after incubation in nattokinase solution.