Menquinone 9 is widely used in the production of dietary supplements aimed at supporting bone and cardiovascular health. It plays a crucial role in the activation of proteins that regulate calcium distribution in the body, which is essential for maintaining strong bones and preventing arterial calcification. Additionally, it is incorporated into skincare products for its antioxidant properties, helping to protect the skin from oxidative stress and promoting a healthy complexion. In the agricultural sector, it is utilized as an additive in animal feed to enhance the overall health and growth of livestock, particularly in improving vitamin K status. Its application in research is also notable, where it is used to study cellular processes related to energy production and oxidative phosphorylation.