Cardiovascular Support for Healthy Fibrinogen Levels Natto Vasc is a specialized fibrinolytic enzyme for support of healthy circulation. The Japanese food natto (from which nattokinase is extracted) is very rich in vitamin K2 which, although it is an excellent form of vitamin K, is contraindicated with many medications prescribed to prevent blood clots. While many supplements may also contain some vitamin K, the nattokinase used in Natto Vasc (Nattokinase NSK-SD™) is produced under a specific patented process that removes all the vitamin K, yielding only the purified enzyme.
