Which vitamin is known to affect blood clotting and coagulation?

Vitamin K is crucial for blood clotting and coagulation, making it essential for preventing excessive bleeding. It plays a vital role in the synthesis of certain proteins known as clotting factors, which are necessary for normal blood coagulation. Without sufficient vitamin K, the body cannot produce these factors effectively, leading to issues with the clotting process and increasing the risk of bruising and bleeding.

In contrast, vitamins A, C, and E do not have this specific function related to blood clotting. Vitamin A is primarily involved in vision, immune function, and skin health. Vitamin C is important for collagen synthesis, antioxidant protection, and immune response. Vitamin E acts mainly as an antioxidant, protecting cells from oxidative stress. While these vitamins have important roles in various bodily functions, none of them directly influence the coagulation process like vitamin K does.