Fibrinogen is a protein your liver makes that helps blood clot when you bleed. This test measures how well fibrinogen works in your blood, which is important for both stopping bleeding and understanding clotting risk.
Fibrinogen is a protein your liver makes that helps blood clot when you bleed. This test measures how well fibrinogen works in your blood, which is important for both stopping bleeding and understanding clotting risk.
When elevated: Elevated fibrinogen activity may indicate increased clotting tendency, which can raise the risk of blood clots, heart attack, or stroke. It can also reflect inflammation, infection, or stress on the body. When low: Low fibrinogen activity suggests your blood may not clot as effectively, increasing the risk of excessive bleeding or bruising. This can occur with liver disease, severe infections, or certain inherited clotting disorders.
Fibrinogen activity is moderately relevant to athletes, as elevated levels may indicate systemic inflammation from heavy training load or inadequate recovery, potentially affecting clotting balance and cardiovascular stress. It's not a primary performance metric, but chronically elevated fibrinogen can signal overtraining or poor recovery status worth monitoring alongside other markers like CRP or cortisol.
Turnaround Time
3 days (up to 7 days)
Order online
Choose your lab and check out. We send your lab requisition automatically — no doctor visit needed.
Get your sample collected
Visit a lab service center near you for a quick blood draw (or book at-home phlebotomy where available).
See your results
Your results land in your Insider portal, ready to review and act on — that easy.
Your price
$29.90$90
3.0× less than retail
Versus the typical direct-to-consumer retail price for this test (illustrative — consumer prices vary by provider and region).
$29.90
Peer-reviewed sources supporting the educational content on this page.
Fibrinogen is a protein your liver makes that helps blood clot when you bleed. This test measures how well fibrinogen works in your blood, which is important for both stopping bleeding and understanding clotting risk.
Fibrinogen is a protein your liver makes that helps blood clot when you bleed. This test measures how well fibrinogen works in your blood, which is important for both stopping bleeding and understanding clotting risk.
When elevated: Elevated fibrinogen activity may indicate increased clotting tendency, which can raise the risk of blood clots, heart attack, or stroke. It can also reflect inflammation, infection, or stress on the body.
The Fibrinogen, Activity test starts at $29.90 at BioReference. No doctor's visit and no insurance needed; we do not bill insurance. Fitomics Insider members pay from $27.90.
Results for the Fibrinogen, Activity test are typically ready about 3 days after your draw, and up to 7 days for some samples. Your results land in your Insider portal.
No. When you order the Fibrinogen, Activity test from Fitomics Research Labs, a licensed physician in our 50-state network reviews and signs your requisition after checkout, and it lands in your portal and inbox. Then visit any Labcorp, Quest, or BioReference patient service center for your draw; results post to your Insider portal.
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