KIRAN, M. D.; NAIK, B. N. A clinical study to determine metformin as a cause of serum vitamin B12 decrease and effect of combination of metformin and mecobalamin on serum vitamin B12 levels in type 2 diabetics. International Journal of Basic & Clinical Pharmacology, [S. l.], v. 6, n. 5, p. 1066–1072, 2017. DOI: 10.18203/2319-2003.ijbcp20171498. Disponível em: https://www.ijbcp.com/index.php/ijbcp/article/view/1543. Acesso em: 24 oct. 2025.