Quick Facts
- Sample: Blood
- Fasting: Requirements vary by laboratory; plan to fast for 8–12 hours.
- Turnaround: 10 business days. May take longer based on weather, holiday, or lab delays. The lab is currently experiencing delays in processing this test, and at this time there is no estimated turnaround available.
What This Test Measures
This test measures the level of Vitamin K1 (phylloquinone) in your blood. Vitamin K1 is the primary dietary form of vitamin K and plays a role in the formation of coagulation factors, substances that help blood clot properly, and is also believed to play a role in bone metabolism.
This test reports a single biomarker, Vitamin K1, from a blood specimen. It does not measure other forms of vitamin K, other vitamins, or other nutritional markers.
Benefits
- Measures circulating Vitamin K1 levels from a blood sample.
- May help evaluate symptoms related to abnormal blood clotting.
- Supports discussion of bruising or bleeding tendencies with your provider.
- Offers a simple blood draw with online results access.
- May be used alongside other clinical information your provider reviews.
Who Is This Test For?
- Individuals experiencing excessive bleeding or easy bruising.
- Individuals with heavy menstrual bleeding.
- People with a history of intestinal malabsorption issues.
- Individuals on long-term antibiotic therapy who want bloodwork reviewed with a provider.
- People with conditions such as Crohn's disease, celiac disease, or IBD wanting related bloodwork.
- Individuals taking medications known to affect vitamin K levels, such as coumarin anticoagulants.
How It Works
- Order Your Test Online
- Visit a Local Lab
- Get Results Online
FAQ
1. What is the purpose of this test?
This test measures the level of Vitamin K1 (phylloquinone) circulating in your blood. It may help a healthcare provider evaluate concerns related to blood clotting and bone metabolism. This test does not by itself diagnose a vitamin K deficiency or any other condition; it provides one data point for your provider to review alongside your health history.
2. Who would benefit from this test?
This test may be useful for individuals experiencing symptoms such as excessive bleeding, easy bruising, or heavy menstrual bleeding. It may also be considered by individuals with intestinal malabsorption issues, certain digestive conditions, or those on medications that can affect vitamin K levels. A healthcare provider can help determine if this test is appropriate for your situation.
3. When should I order this test?
You may consider ordering this test if you are experiencing symptoms associated with a vitamin K deficiency, such as easy bruising or unusually heavy bleeding. It may also be considered if you have a digestive condition or malabsorption concern that could affect vitamin K levels. This test does not replace a full medical or nutritional evaluation.
4. How does this test differ from other nutritional tests?
This test specifically measures Vitamin K1 (phylloquinone) in the blood. It does not measure other forms of vitamin K, other vitamins, minerals, or nutritional markers. Because it reflects a blood measurement rather than a urine or tissue measurement, results should not be treated as interchangeable with other types of nutritional testing.
5. Do I need to fast before this test?
Preparation requirements vary by laboratory. In general, plan to fast for 8 to 12 hours before your blood draw. Confirm specific instructions with your testing location if you have questions.
6. How quickly will I get results?
Results are typically available within 10 business days, though this may take longer due to weather, holidays, or lab delays. The lab is currently experiencing delays in processing this test, and at this time there is no estimated turnaround available.
7. How do I interpret the results?
The meaning of your Vitamin K1 result depends on your individual health history, symptoms, diet, medications, and other laboratory findings. Your provider may consider this result alongside related labs and clinical factors. A low result does not automatically confirm a deficiency, and a normal result does not rule out a nutritional concern. This test measures a blood level only and should not be interpreted as equivalent to urine or other specimen types.
Disclaimer: Reference ranges may vary by laboratory. Listed ranges are general guidelines and may differ from those used by the performing lab. Always consult your healthcare provider for interpretation.
8. What should I do if my results are abnormal?
If your results fall outside the expected range, review them with a qualified healthcare provider. They can help determine whether additional evaluation or testing is appropriate based on your full health picture. Do not start, stop, or change any medication or supplement without professional guidance.
9. How often should I get tested?
Testing frequency should be determined by your healthcare provider based on your individual health needs and symptoms. There is no standard repeat testing schedule for this test, and your provider can advise on follow-up as directed.
Pre test preparation
Requirements vary by laboratory; plan to fast for 8–12 hours.
