A fat-soluble vitamin essential for blood clotting and bone metabolism.
Vitamin K is a fat-soluble vitamin essential for blood clotting and for bone health. The main dietary form, found in green vegetables, is vitamin K1 (phylloquinone), which is what blood tests usually measure.
It is needed to activate proteins that allow blood to clot properly and that help bind calcium in bone.
Vitamin K allows the body to make working clotting factors, so a shortage can lead to easy bruising or bleeding. It also supports bone metabolism. Deficiency is uncommon in healthy adults but can occur with malabsorption, certain medications, or in newborns.
Vitamin K status is often assessed indirectly through clotting tests such as prothrombin time. Direct measurement of vitamin K1 is used in specific situations and is best interpreted with the clinical picture.
Aniva reads your result against research-backed ranges, not just the lab's wide normal. The reference shown below is specific to this biomarker.
Measured as serum vitamin K1 (phylloquinone). Levels vary widely with recent diet, and ranges differ by laboratory and method.
| Status | Serum vitamin K1 |
|---|---|
| Typical adult reference | Approximately 0.3 to 2.6 nmol/L |
Because levels respond quickly to recent intake, a single value should be read with care. Confirm the exact interval with the reporting laboratory.
You learn whether your vitamin K1 level is low, adequate, or high. Direct measurement is less common than clotting-based assessment, but a low result can support a picture of deficiency, particularly with fat malabsorption or poor intake.
Vitamin K1 is light-sensitive and responds quickly to recent diet, so values fluctuate. A recent green-vegetable meal can raise levels, while certain medications, including some blood thinners and antibiotics, can affect vitamin K status. Fat malabsorption lowers levels.
Read alongside prothrombin time or INR, which reflect vitamin K dependent clotting, and with the clinical picture.
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