title: Metformin and B 12  malabsorption.
mesh_terms: D006801:Humans; D007408:Intestinal Absorption / Q000187:drug effects; D008687:Metformin / Q000009:adverse effects* / Q000627:therapeutic use; D014806:Vitamin B 12 Deficiency / Q000139:chemically induced*
chemical_list: D008687:Metformin