Vitamin K is well known for its role in the synthesis of a number of blood coagulation factors and is also important for the formation of strong, healthy bones. Menaq7 MK-7 is a unique soy-free, bioavailable form of vitamin K-2 that plays a critical role in arterial health through its ability to support proper calcium metabolism in blood vessels and arteries. Menaq7 is a registered trademark of natto Pharma Asa, Norway. Patents granted and pending. This extra strength product has three times the vitamin K-2 as in our regular strength product.