Supports fibrinolytic activity* 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 may support healthy blood clotting, circulation, and platelet function by helping to maintain optimum function of the bodys normal fibrinolytic processes.* Produced from fermentation of non-GMO soybean isolates by Bacillus subtilis natto. Standardized to fibrin activity units and free of vitamin K. – ProThera and Klaire Labs have unified under the Klaire Labs logo. This unification will be reflected in new packaging and a continuing commitment to the founding Klaire Labs principles of purity, potency, and performance. – Supports fibrinolytic activity.* – Produced from fermentation of non-GMO soybean isolates by Bacillus subtilis natto. Free of vitamin K. – Nattokinase may support healthy blood clotting, circulation, and platelet function by helping to maintain optimum function of the bodys normal fibrinolytic processes.* – Free of the following common allergens: milk/casein, eggs, fish, shellfish, tree nuts, peanuts, wheat, gluten, and yeast. Contains no artificial colors, flavors, or preservatives.