Question

What if a patient is taking vitamin B12 normally and is still deficient in vitamin B12, what could be the reason? ​

Answer 1

Answer:

The main causes of vitamin B12 deficiency include vitamin B12 malabsorption from food, pernicious anemia, postsurgical malabsorption, and dietary deficiency [12]. However, in many cases, the cause of vitamin B12 deficiency is unknown. The following groups are among those most likely to be vitamin B12 deficient.