Hello friends im back. I have a question for the community regarding possible b12 deficiency. My mohter is 68 years old and had T2 diabetes for the last about 4 years controlled quite well with metformin. Of recent she has started to develop tingling and burning sensations in her feet and legs quite regularly and upon some further reasearch i have discovered this may be due to lack of vitamin b12 vitamin which is possibly depleted by the use of Metformin. Before i go ahead and order a supplement of B12 for my mother i wanted to run this by the good people on this great forum who have really helped me in the past. What i really would like to know is if i do order b12 suplement which brand should i order and how many mg should be taken to have a positive effect. Thank you all for reading