Lifelong PN supplementation is initiated if the PN test is positive, and if it is negative, oral PN is continued for several days to avoid overlooking delayed responses
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Cyanocobalamin (B12): Supports energy production, nerve function, and red blood cell formation
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may be bloody if colonic involvement Abdominal pain and cramping typically right lower quadrant (terminal ileal disease)
Theoretical concerns include methyl-donor depletion with chronic dosing