I'm new here and had a couple questions. A little history.. I had the parietal cell antibody test done (3 times) and each time my test has come back abnormal with a reading of 113.5 or higher. My intrinsic factor was negative about a year ago and hasn't been tested since. My B12 levels have run on the lower side in the past (200s-300s range). I have a history of iron deficiency, my ferritin levels have been as low as 3 before and my vitamin D levels are low too. I've done my own experiments with starting and stopping supplements over the years and noticed that I simply do not absorb these nutrients at all without them. I have a healthy diet and keep track of my food intake to make sure I get enough of these nutrients. I do have a long history of stomach problems, recently I was diagnosed with Barrett's Esophagus and the doctor says he thinks I have pernicious anemia along with atrophic gastritis because I have intestinal metaplasia and inflammation. My main symptoms over the years have been tingling in upper left leg, weakness, upper stomach pain/heartburn symptoms, constipation, undigested food in stool, and lots of nausea. What I wanted to know is pernicious anemia related to atrophic gastritis or autoimmune AG? Is one caused by the other? Is there any specific tests I should have done to get a definite diagnosis?
Thanks so much for reading!