Which vitamin is essential for blood clotting?

Vitamin K is essential for blood clotting because it plays a critical role in the synthesis of certain proteins, known as clotting factors, that are necessary for proper blood coagulation. These clotting factors include prothrombin and factors VII, IX, and X, which are vital in the clotting cascade that prevents excessive bleeding when injuries occur. Without an adequate amount of vitamin K, the body would be unable to effectively form blood clots, leading to increased risks of uncontrolled bleeding and bruising.

Vitamin E, while important for various bodily functions including antioxidant activity, does not directly influence the blood clotting process. Vitamin D is primarily involved in calcium metabolism and the health of bones, and vitamin B12 is crucial for red blood cell production and neurological function, but neither is necessary for blood clotting. Therefore, vitamin K is uniquely recognized for its direct role in ensuring blood clotting occurs efficiently.