College of Massage Therapists of British Columbia (CMTBC) Practice Exam

Which vitamin is crucial for the formation of red blood cells?

1. Vitamin A

2. Vitamin B6

3. Vitamin B12

4. Vitamin C

The correct answer is: Vitamin B12

Vitamin B12 plays a critical role in the formation of red blood cells, primarily because it is essential for DNA synthesis during the production of these cells in the bone marrow. A deficiency in vitamin B12 can lead to impaired red blood cell production, resulting in conditions such as megaloblastic anemia, where the red blood cells are larger than normal and cannot function effectively. Furthermore, vitamin B12 works closely with folate (another B vitamin) to ensure that the development of red blood cells proceeds correctly. This synergy is vital for the overall health of the blood and for preventing anemia. Other options, while important for various bodily functions, do not have the specific role that vitamin B12 does in erythropoiesis (the process of red blood cell formation). For example, vitamin A is important for vision and immune function but is not directly involved in red blood cell production. Vitamin B6 is involved in protein metabolism and the production of neurotransmitters but does not play a central role in red blood cell formation. Vitamin C, while critical for collagen synthesis and antioxidant protection, also does not have a direct link to the maturation of red blood cells.