What are the functions of vitamin K?
Mar 13, 2025
Source: Cainiu Health
Dr. Yang Ziqi
Introduction
Under normal circumstances, vitamin K may play roles in promoting blood coagulation, maintaining bone health, supporting vascular health, preventing hemorrhagic disease in newborns, and assisting in the treatment of certain diseases. Vitamin K is an essential cofactor in the synthesis of coagulation factors such as Factor II and Factor VII. It participates in the γ-carboxylation modification of precursor proteins of these coagulation factors, thereby enabling them to become biologically active.
Generally, vitamin K plays roles in promoting blood coagulation, maintaining bone health, supporting vascular health, participating in cell metabolism, and protecting the liver. Detailed analysis is as follows:
1. Promoting Blood Coagulation
Vitamin K serves as an essential cofactor in the synthesis of coagulation factors such as Factor II and Factor VII. It participates in the γ-carboxylation modification of precursor proteins of these coagulation factors, enabling them to become biologically active and function properly in the blood clotting process. This ensures normal blood clotting and prevents excessive blood loss when the body sustains injuries.
2. Maintaining Bone Health
Vitamin K activates osteocalcin, which promotes the deposition of calcium in bones. This enhances bone density and strength, helps prevent osteoporosis, and reduces the risk of fractures. It is particularly important for the bone health of middle-aged and elderly individuals and postmenopausal women.
3. Supporting Vascular Health
Vitamin K aids in the synthesis and activation of matrix Gla protein, which inhibits vascular calcification. When sufficient vitamin K is present, it reduces calcium deposition in blood vessel walls, maintains vascular elasticity and flexibility, lowers the risk of cardiovascular diseases such as atherosclerosis, and provides protective effects on the cardiovascular system.
4. Participating in Cell Metabolism
Within cells, vitamin K participates in the activation of certain enzymes that play important roles in cellular metabolic activities. For example, it is involved in physiological processes such as cellular signal transduction and gene expression.
5. Protecting the Liver
Vitamin K has a protective effect on the liver by promoting the repair and regeneration of liver cells and enhancing liver detoxification function. Additionally, vitamin K helps maintain normal blood clotting function within the liver, preventing complications such as hepatic hemorrhage.
To ensure good health, individuals should not only supplement vitamin K in daily life but also strengthen physical exercise.
