A high-dose vitamin K supplement reduced calcium precipitates associated with hardening of the arteries by 37 percent in rats, scientists from The Netherlands have reported. If the results can be reproduced in humans, high-dose vitamin K could have potential clinical implications for reducing arterial calcification, which is an important independent risk factor for the development of cardiovascular disease (CVD). “High vitamin K intake not only prevents calcification, but even regresses arterial calcifications,” lead researcher Leon Schurgers said. There are two main forms of vitamin K: phylloquinone, also known as phytonadione, (vitamin K1) which is found in green leafy vegetables such...