Dear Brian Lilley,
Firstly I would like to know if you have any symtom of palpitation(FAST HEART BEAT), shortness of breath
, mild headache or insufficient sleep. If Yes possibly you are anaemic.
There are many reasons of anaemia
one of which is nutritional defficiency caused by less intake or less absorption in your body which is ruled out as you say but worm infestation has also to be ruled out.. Other cause may be low production of blood cells from bone marrow
or the blood cells are quickly destroyed. Firstly a complete blood count
with peripheral smear examination is needed to have the basic clue about the type of anaemia you have. you can go for further investigations for which CBC will be the guide and we can determine what type of anaemia you have. Your primary physician will guide you accordingly.
Clinical Onc and hematologist