title: Reduced serum vitamin B-12 in patients taking metformin.
authors.forename: Josep
authors.initials: J
authors.lastname: Vidal-Alaball
authors.forename: Christopher C
authors.initials: CC
authors.lastname: Butler
mesh_terms: D003924:Diabetes Mellitus, Type 2 / Q000188:drug therapy*; D019587:Dietary Supplements; D006801:Humans; D007004:Hypoglycemic Agents / Q000009:adverse effects*; D008687:Metformin / Q000009:adverse effects*; D012307:Risk Factors; D014805:Vitamin B 12 / Q000008:administration & dosage / Q000097:blood; D014806:Vitamin B 12 Deficiency / Q000139:chemically induced* / Q000178:diet therapy
chemical_list: D007004:Hypoglycemic Agents; D008687:Metformin; D014805:Vitamin B 12