Kanna S., Suresh, Srinivasa Rao Gopisetty, Kavuru Naga Siri, Nitharsha Prakash, and Goutham Kumar A. P. 2023. “Metformin Causes Vitamin B12 Deficiency”. Journal of Coastal Life Medicine 11 (1):239-43. https://www.jclmm.com/index.php/journal/article/view/317.