Based upon the 1000 year old tradition and research of fermented soy, The Nattokinase Supplement helps support health, circulation, and the issues of flow to your extremities. 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, producing a nattokinase complex. Complete Natural Products Nattokinase contains the healthy nattokinase enzyme. Nattokinase has been shown to help support normal circulation and flow.†