Frías Ordoñez, Juan Sebastián, Dayana Andrea Arjona Granados, and Julián David Martínez Marín. “Vitamin B12 Deficiency in Consumption of Metformin and Proton Pump Inhibitors: Déficit De Vitamina B12”. Revista Médica de Risaralda 28, no. 1 (February 14, 2022). Accessed November 10, 2026. https://revistas.utp.edu.co/index.php/revistamedica/article/view/24762.