While Vitamin K2 works effectively on its own, it's recommended to pair it with Vitamin D3. This pair of vitamins feed off one another in order to optimize their abilities within the body. Vitamin D3 is responsible for removing calcium from the blood, while Vitamin K2 aids with calcium transportation into the bones. These two essentials also prevent mineral build ups within the arteries and veins that can lead to heart complications. We now offer this pair as a bundle.