Not a medic nor have the ability to do that job.
Seems to me there is no such thing as B12 deficiency without neurological effects. Most notably fatigue. It seems that neurological symptoms are only considered if peripheral neuropathy is experienced. This does not seem credible to me.
Seems to me the advancement in treatment of B12 deficiency is all but stalled at 1 mg hydroxocobalamin every other day and has been for 25 years. That is considered to solve any problems of any conscience. That does not seem credible in my case.
Seems to me the focus of those trying to help those who experience B12 deficiency is diagnosis. The un-diagnosis and misdiagnosis of B12 deficiency is systemic and many people are suffering needlessly. The effective treatment for a person who is diagnosed seems to not be of interest.
This is not a rant against physicians although I do engage in that at times out of frustration. Nor is it not being appreciative of the work of those that are doing the important work of trying to get other physicians to correctly diagnose.
It is more framing what I am up against.