ARTERIAL CLEANSING-BREAK DOWN BLOOD CLOTS & MORE NEW! Alive Vitamins™ Nattokinase Fermented Enzyme from Japanese Natto Beans Nattokinase is an enzyme extracted from soybeans scientifically studied on its potent fibrinolytic (clot-busting) activity. This results in breaking down fibrinogen, a component of blood clots and atherosclerotic plaque. Elevated fibrinogen levels are another clear risk factor for cardiovascular disease. Nattokinase also assists in arterial cleansing, improves varicose veins, improves blood circulation, relieves nasal inflammation and helps to maintain blood pressure.