Natural Factors - Vitamin K2 100mcg 60vcaps NF includes vitamin K2 in the form of menaquinone-7 (MK-7), a highly absorbable and long-lasting type of vitamin K that has various roles in the body. K2 is crucial in protecting the heart and promoting strong bones by directing calcium to where it is needed, such as bones, and away from places where it could be harmful, like arteries. Unlike other forms of K2, MK-7 offers 24-hour protection with just one daily dose, while other types must be taken in higher dosages and only last a few hours in the body. The K family comprises three vitamins: K1 (phylloquinone), K2 (menaquinone), and K3, a synthetic version that can be harmful to the liver. While K1 can be obtained from vegetables, our gut bacteria do not convert enough to K2 to benefit atherosclerosis and osteoporosis.