Myths vs facts: VKORC1 and Darmgesundheit

The claim that VKORC1 variants directly affect gut health is largely a myth. VKORC1 encodes vitamin K epoxide reductase, a key enzyme in the vitamin K cycle, which is essential for blood clotting. While vitamin K is partly produced by gut bacteria, VKORC1 polymorphisms primarily influence warfarin sensitivity, not gut microbiota composition or intestinal barrier function. No strong human studies link VKORC1 to gut health outcomes like dysbiosis or leaky gut. The evidence is mechanistic and speculative. Consumers should be wary of marketing that positions VKORC1 as a 'gut gene.' For gut health, microbiome testing or vitamin K status assessment is more relevant. Bottom line: VKORC1 is not a gut health marker; its role is in coagulation and pharmacogenetics.