What is the purpose of checking cobalamin (B12) and folate levels in chronic enteropathy?

• A. To assess malabsorption and bacterial overgrowth
• B. To monitor liver function
• C. To measure renal function
• D. To evaluate dehydration status

Answer: (A)

Measuring cobalamin (B12) and folate levels focuses on how well the small intestine can absorb nutrients and on the presence of small intestinal bacterial overgrowth. B12 absorption requires functional ileal mucosa and intrinsic factor, so damage or inflammation in the distal small intestine can lower B12. Folate is absorbed in the proximal small intestine, so reduced absorption here points to proximal intestinal involvement or generalized malabsorption. Bacterial overgrowth in the small intestine can skew these levels: bacteria consume B12 (leading to low B12) and may produce folate (potentially raising folate). Together, these tests help identify malabsorption due to intestinal disease and/or the contribution of bacterial overgrowth, guiding further diagnostics and treatment.