Which vitamin is important for blood clotting?

Vitamin K is essential for the blood clotting process because it plays a crucial role in the synthesis of certain proteins that are required for coagulation, specifically prothrombin and other clotting factors. Without adequate levels of vitamin K, the body would struggle to properly clot blood, which could lead to excessive bleeding in case of injury or a surgical procedure. Vitamin K can be found in various food sources, such as leafy green vegetables, certain fruits, and fermented foods, making it an important nutrient to include in the diet for maintaining proper hemostatic function.

In contrast, the other vitamins listed have different roles; for example, vitamin A is primarily involved in vision and immune function, vitamin C supports collagen synthesis and acts as an antioxidant, and vitamin E mainly functions as an antioxidant and protects cell membranes. Thus, while all these vitamins are essential for overall health, vitamin K's specific involvement in blood clotting distinguishes it as the correct answer in this context.