Activated K2

Vitamin K2 consists of 10 different vitamin subtypes (menaquinones) that are designated as MK-4 through MK-14. Small amounts of MK-4 can be consumed from meat and cheese as well as synthesized from vitamin K1 by intestinal bacteria; MK-7 is found in natto, a fermented soy food. Because good dietary sources of K2 are limited, and because conversion of K1 to K2 in the intestine can be insufficient, poor vitamin K2 status is common.