Vitamin K is a critical supplement needed by the human body to synthesize proteins which are needed to transport and control the binding of calcium in bones. Super K with Advanced K2 Complex from Life Extensions makes it easy to keep up your daily intake of this crucial Vitamin, which can be difficult to obtain from food sources. Without proper levels of Vitamin K, calcium cannot be sufficiently transported or absorbed through your body. Life Extension Super K supplies several different types of Vitamin K: Vitamin K1, K2, MK-4 and MK-7, making it the perfect choice to increase your Vitamin K needs.