– Calcium and vitamin K1 (the latter which can be hard to find rein plant-based sources) are both essential for maintaining strong bones Because of increasing interest in nattokinase, methods of production that increase yield and stability have been explored. For example, irradiation of the bacterial strain B. subtilis natto https://wissenskern.de/nattokinase-ein-uberblick-uber-das-enzym-und-seine-vorteile/