EPI in cats: why cobalamin is essential
8-year-old cat with weight loss despite a ravenous appetite, voluminous greasy faeces and greasy perianal hair. Exocrine pancreatic insufficiency is confirmed (very low fTLI) and serum cobalamin is undetectable.
Why is cobalamin supplementation especially important in this cat?
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A. Because in cats intrinsic factor is produced almost exclusively by the pancreas, and without cobalamin the response to enzymes may be poor
Correct. Unlike dogs, cats do not produce intrinsic factor in the stomach, so almost all cats with EPI are hypocobalaminaemic. The deficiency impairs intestinal function, appetite and general condition.
B. Because commercial pancreatic enzymes destroy dietary cobalamin
The enzymes do not destroy cobalamin; on the contrary, pancreatic proteases are needed to release it from R protein so that it can bind intrinsic factor.
C. Because a single injection is enough: the cat's hepatic cobalamin stores last for months
Cats have limited cobalamin stores that are rapidly depleted in gastrointestinal disease. Repeated supplementation and monitoring of serum concentrations are needed.
D. Because it is needed only if there is megaloblastic anaemia
In cats anaemia due to cobalamin deficiency is rare. Supplementation is needed whenever the concentration is low, even with a normal haemogram.
lightbulb Key takeaway
In cats with EPI always treat with enzymes and cobalamin (periodic subcutaneous injections or, alternatively, daily oral supplementation) and recheck the concentration. Feline EPI can follow chronic pancreatitis and does not always cause obvious steatorrhoea.
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Updated: October 31, 2026 · Educational content for veterinary professionals. It does not replace current clinical guidelines or the judgement of the attending veterinarian.