I've Hashi's, which has an up to 35 per cent overlap with Autoimmune Gastritis, the precursor to PA. Plenty of symptoms, I'd like to know if I have antibodies to intrinsic factor/parietal cells, not least to see if my children are at higher risk.
I will pay for private tests - no point in prolonged arguments with GP, my B12 will be high in range because of supplementation with methylcobalamin. But will that supplementation have affected the antibody levels?
I don't understand why it should. But I see the odd sentence which suggests it might.