Schommers, P., Thurau, A., Bultmann-Mellin, I., Guschlbauer, M., Klatt, A. R., Rozman, J., et al. (2017). Metformin causes a futile intestinal–hepatic cycle which increases energy expenditure and slows down development of a type 2 diabetes-like state. Molecular Metabolism, 6(7), 737-747. doi:10.1016/j.molmet.2017.05.002.