The valuable enzyme nattokinase is naturally present in the traditional Japanese dish of natto (fermented soy beans). Our high-dose nattokinase with 60,000 FU (fibrinolytic units) per 1g is 100% naturally sourced from non-GMO fermented soy beans. Vitamin K2 is removed to ensure the full enzymatic potential of 2,000 FU per capsule. Final product is soy-free. Vegan.