How are VKORC1 and Schlaf related?

VKORC1 encodes subunit 1 of the vitamin K epoxide reductase complex, a key enzyme in the vitamin K cycle. Genetic variants in VKORC1 (e.g., rs9923231) significantly affect warfarin dosing by modulating enzyme activity and thus anticoagulation. A direct causal link between VKORC1 and sleep (quality, duration, or disorders) is not scientifically established. There are isolated association studies linking vitamin K levels to sleep parameters, but the evidence is weak and inconsistent. Most knowledge comes from pharmacogenetic contexts. Consumer DNA tests can identify VKORC1 variants, but interpreting them for sleep is speculative. No clinically relevant sleep health conclusions can be drawn. For sleep issues, standard medical evaluation is recommended.