Nattokinase Pro™ contains NSK-SD®, the first nattokinase derived from the food natto, to be introduced to the US market. In combination with nattokinase, a comprehensive blend of supportive enzymes works synergistically to promote total body wellness and cardiovascular health.* Nattokinase helps to maintain healthy levels of fibrin by encouraging healthy blood coagulation for an optimally functioning cardiovascular system.* Natto naturally contains high levels of vitamin K2, which is essential for blood coagulation. Nattokinase NSK-SD is processed in a unique way to remove Vitamin K2 for those who should restrain from consuming this nutrient.