ACE Health Coach Certification Practice Test

Which vitamin is essential for blood-clotting functions?

1. Pantothenic acid

2. Thiamin

3. Vitamin K

4. Choline

The correct answer is: Vitamin K

Vitamin K plays a crucial role in the blood-clotting process, as it is necessary for the synthesis of certain proteins, known as clotting factors, that are essential for blood coagulation. When an injury occurs and bleeding starts, vitamin K-dependent proteins become activated to form a clot, which helps to stop the bleeding and initiate the healing process. Other vitamins and nutrients, such as pantothenic acid, thiamin, and choline, serve important functions in the body—such as energy metabolism and the synthesis of neurotransmitters—but they do not have a direct role in the blood-clotting mechanism. Pantothenic acid is involved in the synthesis of coenzyme A, thiamin is important for carbohydrate metabolism, and choline is significant for cell membrane integrity and neurotransmission. However, none of these are specifically tied to the blood-clotting functions in the same way that vitamin K is.