Hi pearlgirl
I have tested positive for anti parietal cells and have been told I have auto immune gastritis. Last Dec. I got my level up to 1419 by taking up to 3 5000mcg (jarrow methly b12) a day. I cut back to maybe 3 to 5 a week. In the begining of may my level dropped to 502. I am also taking other supplements. Lots of things improved for me but the one thing that is constant is the fatigue and weak muscles. My GI doctor thinks I should cut back to 1000mcgs a day, I don't think I will. I think Iam better off at 5000 a day at least.

I have been dealing with this issue for over 2 years now and Iam still unable to find a doctor who really knows about b12. I also had an mri done that showed multiple leasions. A neg. lumbar puncture convinced the neuro. that it is not MS, but I never got an answer as to what those leasions are from.
I just recently had a blood test to check hormone levels and my cortisol came back high. THe doctor wants to check for cushings (I know I do not have that). He told me to reduse the stress in my life! Well since my husband would frown upon getting rid of my kids, I guess I have to deal with my stress!! LOL who dosn't have stress??

I am going to continue with what Iam doing. I think at first you feel great then there are set backs and then you start feeling good again.

Good luck