Metformin is the most-recommended drug for type 2 diabetes
…according to an article at MedPageToday. I consider this finding preliminary, but definitely something to keep an eye on. We need confirmatory data before taking action. Long-term metformin users should get vitamin B12 levels checked periodically in view of the well-established association of low levels in users. Low B12 impairs cognition and is easily preventable or treated.
Diabetic Mediterranean Diet 
Is this a real metformin issue or is it really a B-12 lack. I have heard of cases of elderly patients with some mental not working well not on metformin but when given B-12 soups them back up