Nattakinase is a fibrinolytic enzyme produced from Natto a Japanese fermented soy food. The Nattokinase in this formula has high enzyme activity providing 20,000 fibrin units (FU) per gram and is free of Vitamin K. The Plus in this formula is the inclusion of another fibrinolytic enzyme, Serratiopeptidase with Rutin, a flavonoid that acts as an antioxidant and free radical scavenger to support capillary strength and vascular health.**This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. • Nattokinase, Serratiopeptidase, Rutin (Bioflavonoid). Other Ingredients: Rice Flour, Vegetable Cellulose, Vegetable Stearate, Hydroxypropylmethylcellulose.