Based on a 1000-year-old tradition of fermented soy, our Nattokinase is an enzyme powder derived from natto, a traditional fermented soy food popular in Japan. During the natto production process, non-GMO soybeans are boiled and fermented to produce the nattokinase enzyme. Complete Natural Products Nattokinase contains the nattokinase enzyme. 1 gram of our Nattokinase provides 6000 FU (Fibrinolytic Units). Each serving of 2 capsules contains 6000 FU.