"Pure Encapsulations Vitamin K with D3 is a blend of vitamin K1, vitamin K2 and vitamin D3. Vitamin K and vitamin D have mutually beneficial functions making the combination of these vitamins synergistic. Vitamin K contributes to normal blood clotting. Vitamin D contributes to normal blood calcium levels. Vitamin K and Vitamin D contribute to the maintenance of normal bones. One Capsule provides 1,545 mcg vitamin K and 1000 IU vitamin D3"