24-Hour Vitamin K Intake Assessment

Why This Test Is Done

Your healthcare provider may recommend this test if you have concerns about vitamin K deficiency, dietary changes, or conditions affecting vitamin K absorption (such as liver disease or certain medications). It can also help monitor patients on long-term vitamin K supplements or those with bleeding disorders.

What to Expect Before the Test

No special preparation is needed for this test. You’ll likely be asked to complete a dietary record or provide a 24-hour food log to track vitamin K sources (e.g., leafy greens, nuts, or fortified foods). Blood or urine samples may be collected separately for verification.

How the Test Works

This is a dietary assessment rather than a blood or urine test. You’ll report all vitamin K-containing foods and supplements consumed in the past 24 hours. Some labs may cross-reference with lab results (e.g., prothrombin time) to validate intake estimates.

What the Results Mean

Results are qualitative (qualitative assessment of intake) rather than a single numeric value. Low intake may indicate dietary gaps, while high intake could signal excessive consumption. Your provider will interpret results in context of your overall health and lab findings.