Vitamin B12 deficiency

Nutrients

 

Causes

• Dietary deficiency
• Alcoholism 
• Atrophic gastritis
• Gastrectomy 

 

Consequences

• Vitamin B12 deficiency anemia
• Pernicious anaemia (deficient B12 absorption due to a lack of intrinsic factor) 
• Subacute Combined Degeneration

 

Investigations

• Serum vitamin B12 levels 

 

See also

• Folic acid deficiency