MUC5AC and type 2 diabetes mellitus: Likewise, metformin enriched mucin-degrading Akkermansia muciniphila and several SCFA-producing bacteria while decreasing the abundance of the Intestinibacter genus in drug-naïve patients with T2D and a large cohort of Colombian T2D patients (de la Cuesta-Zuluaga et al., 2017; Wu et al., 2017).