High B12, High Folate, High MCH and b12 deficiency symptoms
I have high serum b12 ">1000" and high serum folate ">19", I have not been supplementing b12. I have every symptom of b12 deficiency--sensory neuropathy, fatigue, cold extremeties, paleness. I also high MCH. Level was 33 (27-32).
I do have Hashimotos and have been on medication for years but had a relapse recently when all these symptoms appeared (TSH was 10). I have also been on metformin 12 years and know that can lead to b12 deficiency. I do eat dairy but not meat.
I tested negative for celiac and other auto-immune possibilities--sed rate low, ANA neg, RH factor negative.
My question then--is it possible to have an elevated serum b12 and not be absorbing the b12 on a cellular level? If so, why and what test would prove it?