Lab services are not currently available. We're working to bring Feelrx Labs online soon — everything below is a preview of what's coming.
Quest / Blood & Iron Markers
Fibrinogen Activity, Clauss
Fibrinogen Activity, Clauss measures how well your blood can form clots by testing the function of fibrinogen, a protein made in the liver. Low levels can increase bleeding risk, while high levels can signal inflammation or other conditions.
Coming Soon
What this lab measures
Fibrinogen Activity, Clauss measures how well your blood can form clots by testing the function of fibrinogen, a protein made in the liver. Low levels can increase bleeding risk, while high levels can signal inflammation or other conditions.
How testing works
Order online
Choose your marker and add a brief medical history so your result has context from the first draw.
Visit a partner lab
Take your order to a certified Quest location for a short blood draw.
Clinician review
A licensed clinician reviews your result and shares clear interpretation with next steps.
FAQ
After ordering, visit a certified Quest partner location for a short blood draw. No insurance is required.
Feelrx / Start here
Know your baseline.
Order a panel online, draw at a certified partner lab, and receive a clear clinician review.
Coming Soon