Nattokinase is an enzyme isolated from Natto, a traditional Japanese fermented soy food. Natto has been consumed for thousands of years for its numerous health promoting properties. More recently, both clinical and non-clinical studies has demonstrated that Nattokinase can help to promote heart and circulatory healthy by supporting normal blood clotting functions. NOW¨ Nattokinase is derived from non-GMO soy and has 2,000 FUs (Fibrinolytic Units) per 100 mg serving.