What does cobalamin assess in chronic enteropathy evaluation?

What does cobalamin assess in chronic enteropathy evaluation?

• A. Distal small intestinal (ileal) absorption
• B. Proximal small intestine absorption
• C. Pancreatic function
• D. Hepatic function

Answer: (A)

Cobalamin absorption occurs in the distal ileum via the intrinsic factor–cobalamin complex, so evaluating cobalamin levels mainly reflects ileal absorptive capacity. In chronic enteropathy, a low cobalamin level points to dysfunction or inflammation in the distal small intestine, such as ileal disease or bacterial overgrowth, affecting how well this nutrient is absorbed. This test therefore helps identify ileal involvement and guides management. It does not directly measure proximal small intestine absorption, pancreatic function, or hepatic function, which are assessed with other markers and tests.

Cobalamin absorption occurs in the distal ileum via the intrinsic factor–cobalamin complex, so evaluating cobalamin levels mainly reflects ileal absorptive capacity. In chronic enteropathy, a low cobalamin level points to dysfunction or inflammation in the distal small intestine, such as ileal disease or bacterial overgrowth, affecting how well this nutrient is absorbed. This test therefore helps identify ileal involvement and guides management. It does not directly measure proximal small intestine absorption, pancreatic function, or hepatic function, which are assessed with other markers and tests.