Sorry to admit that I dont understand PA at all, only that it causes low B12. I am a thyroid sufferer, have low vitd and hypoferritininemia, which is low ferritin levels but normal iron levels (both diagnosed by endo) and take supplements for these. I am gluten, dairy, sugar, legume and meat free (have been meat free for 30+ years). My very first blood test showed my B12 just above range, so of course the GP did nothing. I supplemented and got it to the 600 mark but two years later is was back down to just above the lower range again. I have a very good relationship with my GP (after a lot of hard work and several battles) and was wondering if I should ask for some investigations to be carried out, but my main questions is why cant I just keep taking B12 or is it important to get a PA diagnoses and if so why????
Sorry for being so ignorant on this subject but I am very willing to learn, do research and fight the NHS for any tests required.