Consequence of vitamin B12 deficiency is impaired…

A consequence of vitamin B12 deficiency is impaired DNA synthesis. Vitamin B12 is crucial for proper DNA synthesis and cell division, and its deficiency can lead to megaloblastic anemia, where red blood cells are large and immature due to disrupted DNA synthesis.

Consequences of vitamin B12 deficiency is impaired production of intrinsic factor. This deficiency can lead to Pernicious Anemia- it dates from the era when treatment had not yet been discovered, and the disease was fatal—but it remains in use for megaloblastic anemia.