Vitamin D3 with K2A growing body of research shows that when it comes to bone health, ensuring optimal intake of vitamin K is a critical piece of the puzzle. New research is focusing on the synergistic relationship between vitamin K (specifically, vitamin K2) and vitamin D3, especially in terms of bone strength and cardiovascular health. A group of naturally occurring and structurally similar, fat soluble vitamins, vitamin K is essential for the proper utilization of