Hi Recently I've heard more and more about how B12 deficiencies cause/ exacerbate POTS symptoms. 4 years ago I had a slew of blood tests and my B12 levels were one of them - my level was 300. I've read a bit about this and it seems that this is definitely on the low end; however my doctor at the time said that it was all normal and back then I knew nothing about B12, so I nodded happily along. Now I am trying to get a B12 test and an intrinsic factor blocking antibodies test to test for pernicious anemia and it is a bit of a mess. The cardiologist says go for it, but they don't do that there so try the primary care dr. the primary care doctor isn't sure if they can do that because of some insurance nonsense. I've read about how B12 injections are amazing for people with POTS and while my B12 levels four years ago were technically within the "normal levels", it is just barely within normal levels. I know this is rather longwinded, so my real question is, does anybody have any experience with B12 / pernicious anemia testing? Any tips on how to get your dr. to order this test and/ or give B12 shots? Thanks.