What is a potential consequence of consuming a high amount of Vitamin K while on a Vitamin K antagonist?

The correct answer is that consuming a high amount of Vitamin K while on a Vitamin K antagonist can lead to reduced efficacy of the medication. Vitamin K antagonists, such as warfarin, work by inhibiting the action of Vitamin K, which is necessary for the synthesis of certain clotting factors in the liver. When an individual increases their intake of Vitamin K through diet or supplements, it can counteract the effects of the medication and potentially lead to a more substantial level of clotting factors in the bloodstream. This interaction can result in less effective anticoagulation, increasing the risk of thromboembolic events, such as strokes, for individuals who are prescribed these medications for conditions like atrial fibrillation.

This highlights the importance of maintaining a consistent intake of Vitamin K for patients on these medications to ensure that their anticoagulation therapy remains effective.