Hospital
$150+
Other Labs
$59
TestWell
$36.99
Vitamin K is a fat-soluble vitamin essential for the synthesis of proteins required for blood clotting (coagulation factors) and bone metabolism (osteocalcin). Deficiency can lead to excessive bleeding and may contribute to osteoporosis. This test is particularly important for patients on blood thinners (warfarin), those with malabsorption disorders, and newborns, who have naturally low vitamin K levels.
Sample Type
Blood draw
Fasting
Not required
Results In
5–7 business days
Performed By
Quest
1 biomarker tested
Your Vitamin K results will include values for each of the 1 biomarker tested, along with reference ranges. Results are reviewed by a licensed physician before being released to your secure portal.
If any values fall outside the normal range, your report will include guidance on what that may mean and recommended next steps. You'll receive an email notification when your results are ready, typically within 5–7 business days.
Typical reference range layout
Lab reports show where your value sits relative to established reference intervals—your physician interprets this in context for you.
No fasting required. Inform your provider if you are taking blood thinners or vitamin K supplements.
TestWell Price
$36.99
No insurance needed · HIPAA compliant
Frequently ordered together
Customers who ordered Vitamin K also added these for a more complete health picture.
Complete blood count with white blood cell breakdown — the gold standard for overall blood health screening.
$21.99
The primary screening test for thyroid function — detects both overactive and underactive thyroid.
$26.99
Measures your body's iron stores — the most sensitive early indicator of iron deficiency.
$24.99
Vitamin K
$36.99