That is a good idea. When I called my gastro doc to tell them of the research I've been doing and the symptoms I am having with my tongue, the nurse said they have never had any patients with the tongue problem. She instantly sent in orders for my B-12 and folic acid to be tested. My folic acid was ok but again, B-12 very low. Just in the 5 injections I've given myself so far, I see a difference in the color of my tongue. I can't live without the meds but am really starting to worry about the long term effects of them.