28th May 2025

A 24-year-old male presents with a recent onset of gastrointestinal symptoms.

A 24-year-old male presents with a recent onset of gastrointestinal symptoms. He has recently had blood tests which reveal a deficiency in vitamin B12.

Which of the following gastrointestinal conditions is most likely to precipitate a vitamin B12 deficiency?

Select the SINGLE most appropriate option from the list below. Select ONE option only.