What is the most common cause of vitamin K deficiency?
A) Administration of warfarin (Coumadin)
B) Total parenteral nutrition (TPN)with antibiotic therapy
C) An immunoglobulin G (IgG)-mediated autoimmune disorder
D) Liver failure

Question

Quizplus · Accepted Answer

Total parenteral nutrition (TPN) with antibiotic therapy can lead to vitamin K deficiency because antibiotics can disrupt gut flora that synthesize vitamin K, and TPN may lack sufficient vitamin K supplementation.

What Is the Most Common Cause of Vitamin K Deficiency