Vitamin K is a family of fat-soluble vitamins that catalyze biochemical reactions that are important for both blood clotting and calcium metabolism. While vitamin K1, found mostly in green leafy vegetables and plant oils, is primarily involved in blood clotting, vitamin K2, found in fermented food...
Natto is a rich source of Vitamin K2. However, Vitamin K2 is known to interact and reduce the effectiveness of anticoagulants like blood thinner and people taking such medication are usually advised by their doctors not to take large amount of Vitamin K. Vitamin K2 is removed from Nattokinase ...