From Dr. Ara Keshishian's blog:
September 3, 2014 Group Meeting & Webinar Laboratory Studies and Vitamin K
Vitamin K is a fat soluble vitamin that has two forms, K1 and K2. It has long been thought that the majority of Vitamin K2 was synthesized by the microflora in the gut. But research is revealing that it may involve more processes and is more significant than was previously thought. Vitamin K 1 is found in dark leafy vegetables and plays more of a role in blood coagulation. Vitamin K2 is found in hard cheeses, egg yolk, soft cheeses, natto, chicken liver, other organ meats, ground beef, salami and grass fed beef butter. Vitamin K2 has a much broader function in directing calcium, via Human matrix Gla protein, to appropriate places to deposit such as bone and teeth and preventing it from depositing in arteries and possibly forming kidney stones. It is also a antioxidant which has shown to reduce cancer risk and encourage healthy nerve growth and protection
http://www.lef.org/magazine/2008/3/Protecting-Bone-And-Arterial-Health-With-Vitamin-K2/Page-01 has an article on K2.
September 3, 2014 Group Meeting & Webinar Laboratory Studies and Vitamin K
Vitamin K is a fat soluble vitamin that has two forms, K1 and K2. It has long been thought that the majority of Vitamin K2 was synthesized by the microflora in the gut. But research is revealing that it may involve more processes and is more significant than was previously thought. Vitamin K 1 is found in dark leafy vegetables and plays more of a role in blood coagulation. Vitamin K2 is found in hard cheeses, egg yolk, soft cheeses, natto, chicken liver, other organ meats, ground beef, salami and grass fed beef butter. Vitamin K2 has a much broader function in directing calcium, via Human matrix Gla protein, to appropriate places to deposit such as bone and teeth and preventing it from depositing in arteries and possibly forming kidney stones. It is also a antioxidant which has shown to reduce cancer risk and encourage healthy nerve growth and protection
http://www.lef.org/magazine/2008/3/Protecting-Bone-And-Arterial-Health-With-Vitamin-K2/Page-01 has an article on K2.