Vitamin K is involved in blood coagulation, bone metabolism and assists in reducing urinary calcium excretion. Vitamin K is a cofactor in several biochemical pathways, especially, the ?-carboxylation of glutamyl residues in the bone protein osteocalcin, matrix ?-carboxyglutamyl protein, and protein S. Vitamin K2 is the most potent form, exerting the highest gamma-carboxylation activity when compared to other vitamin K forms. Vitamin D3 is a critical vitamin to overall human health.�K2-D3 SAP�can help alleviate osteoporosis by improving bone mineral density and enhancing healthy bone development.�K2-D3 SAP�can help maintain immune function and regulate the process of normal cell division.