I have just been diagnosed with vitamin B12 deficiency and having a nose online I note it can be an effect of Metformin use, and getting older along with a few others. It was discovered while I had tests at the hospital. I now have to have 3 injections for two weeks then one every three months...
Some months ago I had a routine annual blood test and all was fine except my Vitamin B12 was rather low I think from memory it was 116 pg/mL when the (range is 180 - 1100) I had recently stopped taking metformin as well as fairly regular Omeprazole use and my doctor requested another blood test...