Hi,
here is a link showing an overview of folate/b12 deficiency.
Read about vitamin B12 or folate deficiency anaemia, which occurs when a lack of vitamin B12 or folate causes the body to produce abnormally large red blood cells.
www.nhs.uk
the two vitamins work together,
so a low level of one may be accompanied by an imbalance in the other, which results in a form of anaemia.
were you told to stop the Metformin? I would have thought that (providing you don’t have difficulties taking Metformin) that a simpler solution would be to supplement both B12 and folate.
I have to supplement high doses of both of those (and several other vits and mins) because my guts fail to absorb enough nutrition from food, no matter how nutritious it is, or how much I eat. Supplementation can be an easy, available and convenient option.