* Natto Extract * Supports Healthy Circulation * Dietary Supplement * Vegan * Suitable for Vegetarians/Vegans Jarrow Formulas NattoMax is a highly purified Nattokinase with vitamin K removed. Nattokinase is naturally occurring in traditional Japanese food (natto) fermented by Bacillus subtilis natto. NattoMax is concentrated without solvents. Each capsule offers 2,000 Fibrinolytic Units. Nattokinase is a fibrinolytic enzyme that supports healthy circulation by its effects on serine protease-mediated digestion of fibrin.