24th July 2024

A 22-year-old male presents to his GP with fatigue. He has routine blood tests

A 22-year-old male presents to his GP with fatigue. He has routine blood tests, which show an iron-deficiency anaemia. He reports no weight loss or rectal bleeding, however does have intermittent diarrhoea, but this has been longstanding and does not bother him. He has no past medical history but reports a family history of thyroid problems.

What would the most appropriate next investigation be to investigate his anaemia?

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