*Research suggests a synergistic relationship between vitamin K2 and vitamin D3, specifically for bone and cardiovascular health. Vitamins are essential to a successful plan or a healthy, well balanced lifestyle. Two vitamins that greatly help our bodies as we age and develop are K2 and D3. A group of naturally occurring and structurally similar, fat-soluble vitamins, vitamin K is essential for the proper utilization of calcium. Through its activation of the protein osteocalcin, vitamin K helps to bind newly absorbed calcium to the mineral matrix in bone.