Vitamin B12 deficiency

Vitamin B12 deficiency is a topic covered in the Diagnosaurus.

To view the entire topic, please or purchase a subscription.

Medicine Central™ is a quick-consult mobile and web resource that includes diagnosis, treatment, medications, and follow-up information on over 700 diseases and disorders, providing fast answers—anytime, anywhere. Explore these free sample topics:

Medicine Central

-- The first section of this topic is shown below --


  • Dietary deficiency (seen in vegans)
  • Decreased intrinsic factor production: pernicious anemia, gastrectomy
  • Competition for B12 in gut: blind loop syndrome, fish tapeworm (rare)
  • Decreased ileal B12 absorption: surgical resection, Crohn's disease, metformin
  • Pancreatic insufficiency
  • Helicobacter pylori infection
  • Transcobalamin II deficiency (rare)

-- To view the remaining sections of this topic, please or purchase a subscription --

Last updated: December 1, 2014