Pure Encapsulations NSK-SD (Nattokinase) 100mg 60cPure Encapsulations NSK SD Nattokinase 100mg delivers targeted cardiovascular support through a standardized extract of nattokinase, a fibrinolytic enzyme derived from natto. This formula addresses the delicate balance your body requires for optimal circulatory health. Nattokinase works by supporting the fibrinolytic process, which helps maintain healthy blood clotting dynamics. While clotting is essential to prevent excessive bleeding from minor