First, Many thanks to Rose! Your efforts have much educated me.

Latest labs showed serum potassium at 5.6 mmol/L, a tenth of a point over this labs' age dependent reference range. All other chemistries, liver, kidneys show very good results. I did not have a serum B12 pulled on this pass.

So, I have been experiencing some classic B12 malabsorbtion symptoms; the most prominent being burning foot-soles with a lovely bright red color. All the other symptomology I had been blowing off, as I'm so accustomed to weird stuff as a survivor of multiple brain injury. Increased fatigue, PN, achy muscles, etc..

What caught my attention on one of Rose's posts somewhere was something about potassium stores being drawn down when B12 is being utilised. Am I being too simplistic to wonder about my B12 malabsorbing if my potassium is high, with no other apparent issues?

Only other thing that comes to mind re: potassium would be adrenal/aldosterone insufficiency.

But my gut tells me that B12 and probably B6 are problematic.

Any feedback gratefully welcomed, and thanks from a long time lurker for all your previous help.

Jeff