Vitamin K is a cofactor for the gamma-carboxylation of many proteins, including osteocalcin, one of the main proteins in bone [ ... Because vitamin K is required for the carboxylation of osteocalcin in bone, vitamin K deficiency could also reduce bone ... Although vitamin K is involved in the carboxylation of osteocalcin, it is unclear whether supplementation with any form of ... Vitamin K treatment reduces undercarboxylated osteocalcin but does not alter bone turnover, density, or geometry in healthy ...