Mega D 3 and Mk 7 combines two nutrients extensively researched for their roles in the health of bones, teeth and the cardiovascular system. Vitamin D3 works with calcium to support bone health, and more recent studies indicate its important for immune system health as well. Mena Q7 MK7 is a unique bioavailable form of vitamin K2 that plays a critical role in arterial health through its ability to support proper calcium metabolism in blood vessels and arteries. Vitamin K2 is also important for the strong healthy bones.