← Genes & pathways

Gene & pathway reference · FROM DR. PURSER’S TEACHING

VKORC1

VKORC1 encodes vitamin K epoxide reductase, part of the vitamin K recycling system used in activating clotting proteins. It is not simply a vitamin K receptor.

Based on teaching by Dan Purser, MD. How we prepare these guides

Updated Sep 23, 2026 · Educational reference

THE TEACHING CONNECTION

Recycling vitamin K and responding to warfarin

Recycling vitamin K and responding to warfarin

VKORC1 encodes vitamin K epoxide reductase, part of the vitamin K recycling system used in activating clotting proteins. It is not simply a vitamin K receptor.

Putting the pieces together

Dr. Purser’s notes flag this pathway because it matters to clotting and medication response. Certain variants can alter warfarin dose requirements, including increased sensitivity; they do not generally mean warfarin will not work. Anyone taking warfarin should discuss vitamin K products or substantial dietary changes with the anticoagulation team and continue prescribed INR monitoring.

A question to bring to your visit

Does my pharmacogenetic result affect my warfarin plan, and who is coordinating vitamin K intake and INR checks?

Variant lookup

These names can help you find an entry on your original genetic report. Seeing a name here does not tell you whether it affects your health or whether you need treatment.

Names you may see

Vitamin K Epoxide Reductase Complex Subunit 1