filename: metformin_combined.count.20M raw metagenomics reads generated from the metformin project (ref1) mapped to IGT_SCAPIS_gene catalog (ref2); all samples were rarefied to contain 20M reads. Please cite the following two papers for using this dataset: 1) Metformin alters the gut microbiome of individuals with treatment-naive type 2 diabetes, contributing to the therapeutic effects of the drug H. Wu, E. Esteve, V. Tremaroli, M. T. Khan, R. Caesar, L. Manneras-Holm, et al. Nat Med 2017 Vol. 23 Issue 7 Pages 850-858 2) The Gut Microbiota in Prediabetes and Diabetes: A Population-Based Cross-Sectional Study H. Wu, V. Tremaroli, C. Schmidt, A. Lundqvist, L. M. Olsson, M. Kramer, et al. Cell Metab 2020 Vol. 32 Issue 3 Pages 379-390 e3