Nattokinase is a proteolytic enzyme whose principle effect is fibrinolysis or degradation of fibrin, a fibrillar protein that when linked together forms the mesh essential for blood clot formation.* Nattokinase also upregulates the body’s natural mechanism that guards against excess fibrin formation.* Nattokinase may support healthy blood clotting, circulation, and platelet function by helping to maintain optimum function of the body’s normal fibrinolytic processes.