Hi. In 2013 I was told I had a positive antibody test for anti gastric parietal cell ABs and also had a B12 of 317pg/mL. I have many symptoms, initially gastric issues including intermittent constipation & diarrhoea, bloating, tarry stools, abdominal pain and weight gain. I later started to have neurological issues affecting balance, gait and later I developed a mood disorder and psychosis and was diagnosed with bipolar (which is likely to be reversed). I have other autoimmune conditions - Hashimoto's and psoriasis and have been tested for coeliac and arthritis. Unfortunately my GP never acted on the test results as they were done privately and as I was taking antipsychotics I suspect they put the neurological symptoms down to the bipolar disorder and side effects from the meds.
I started taking taking 1000μg methylcobalamin last summer (2016) which I self prescribe and my levels are now 813 pg/mL and I follow the Autoimmune Protocol Diet and have managed to put every symptom into remission. My doctor now thinks there was a misdiagnosis with regard to the bipolar.
So do I have an autoimmune gastric condition? Maybe Atrophic Gastritis or PA? This is all very new to me and I would welcome any advice or guidance.