* Science-Based Nutrition * Dietary Supplement * 2,000 FUs Per Veggie Cap * Suitable for Vegetarians Nattokinase is an enzyme derived from "natto", a traditional fermented soy food popular in Japan. During the natto production process friendly Bacillus subtilis bacteria ferment boiled, non-GMO soybeans, producing nattokinase. Best Nattokinase contains nattokinase enzyme with Vitamin K2 removed.