Phytonadione

Phytonadione is vitamin K1, an essential fat-soluble vitamin crucial for blood clotting and bone metabolism. This test measures the level of vitamin K1 in your blood. Vitamin K1 is obtained primarily from leafy green vegetables and is necessary for your body to produce clotting factors that prevent excessive bleeding. Low levels may indicate malabsorption issues, liver disease, or antibiotic use that disrupts gut bacteria. Deficiency increases bleeding risk and can affect bone health.