Metformin and B12.
I was doing some research the other day about the side effects of metformin.One of the things I read was "can cause B12 deficiency".Little light comes on.Hmmm.So I started taking B12.What a difference!Especially with my mood.I was constantly getting grumpy with constant negative thoughts.Thought it was just age(I'm 65 btw).That has stopped.I feel so much better.Anyone else with moodiness,give it a try.As far as I can tell It doesn't affect my BG.