$16.00
Priced per marker, with baseline labs included. You’ll see your total before you pay.
Bone health
Vitamin K test
Fat-soluble vitamin essential for clotting and bone health.
At a glance
In about 5 days
Most results are ready in about 5 days. Some specialty markers can take up to 21 days.
Check before your draw
This marker has no preparation tag, but it can still need preparation. Contact us before your draw if you’re not sure.
Walk in at Quest
Your lab order arrives by email. Most Quest locations take walk-ins, so bring it with a photo ID.
What it measures
Vitamin K helps your blood clot and plays a part in keeping bones strong. You get it mainly from leafy green vegetables, and your gut bacteria make some too.
Why it matters for women
Low vitamin K can show up as easy bruising, nosebleeds, or bleeding that’s heavier or lasts longer than usual. It also plays a part in bone health, which matters more as bone loss can speed up after menopause. Low levels can be uncommon, but they may happen more with gut conditions that limit how you absorb fat.
You might check it if…
- you bruise easily or bleed longer than expected
- a gut condition like celiac or Crohn’s affects how you absorb food
- a clotting test came back slower than expected
What your result may mean
High Vitamin K: what it may mean
High vitamin K may come from supplements or a recent meal rich in leafy greens, since this test can track what you ate lately. High triglycerides can raise the reading too, because vitamin K can travel with fats in the blood. On its own, a high value may not be harmful. If you take warfarin, a big change in vitamin K can affect how that medicine works, so it can help to tell your clinician about any supplements.
Low Vitamin K: what it may mean
Low vitamin K may slow blood clotting and can affect bone health. It can happen with gut conditions that limit how you absorb fat, long courses of antibiotics, or warfarin, a blood thinner that can block how the body uses vitamin K. You may notice easy bruising, nosebleeds, or periods that are heavier or last longer than usual. Because this level can change with recent meals, one low value may not point to a long-term shortage, and clotting tests such as PT/INR can add detail.
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No insurance required · HSA/FSA eligible · No subscription
These notes provide context and do not diagnose a condition. Not yet available in NY, NJ, RI, HI, ND, SD or WV.