So the doctors asked for a PA test done and the labs automatically redone my serum vitamin b12 but no PA result has been recieved. Has anyone else had this, its been a week apart from each blood test the first one was 156 and the next one barely a week later is 214? When I asked the doctor why such a difference in a week he couldn't tell me. What I find weird is it usual for them to automatically redo my serum b12 with a Intrisic Factor Test, or have they done the wrong test or is it their not doing the test now because miraculously its gone up within a week and now classed as no deficiency. The GP definitely asked for a IF test not a serum vitamin b12 test as I saw it on the blood request form I took to the hospital where I got my bloods done? He also stated that my sister has PA and I have had similar symptoms to her and my recent result of 156 and ferritin 8. Its so annoying as now I think I will be in worse position to get them to do anything to help diagnose me. I have been left with a ferritin level of below 10 for years now as Iron supplementation did nothing, yet it looks like I am sat borderline on everything else so its always a wait and see. However my symptoms are getting worse, I feel like just forking out a small fortune on private tests at the Nuffield. Anyone had any luck with this. Why are they so reluctant to do IF tests are they expensive?