Why Vitamin K Matters for Seniors – And Why It Can Raise Concerns
Vitamin K plays a key role in helping your blood form clots when needed, such as after a cut or injury. It’s often called the “clotting vitamin” because it supports proteins in the liver that keep coagulation balanced. For most healthy adults, getting enough through food supports bone health and may even help keep arteries clearer by directing calcium where it belongs.
However, research shows that high-dose vitamin K supplements can interact with common blood-thinning medications like warfarin (Coumadin). These medications work by blocking vitamin K’s effects to prevent dangerous clots. Suddenly adding extra vitamin K through pills can reduce how well the medication works, potentially allowing clots to form more easily. Studies, including those from the American Heart Association, note that inconsistent or excessive vitamin K intake may shift this delicate balance, raising worries about vascular events in older adults already managing heart rhythm issues or prior clot risks.
