Previously, Allobaculum was associated with body weight loss and to an improvement of metabolic parameters [44,49]; whereas, the enrichment of Akkermansia showed a positive correlation with GLP-1 levels, lower LPS concentration in blood, reduction of inflammation markers, decrement of fat mass development, insulin resistance, and dyslipidaemia in obese mice [45,50,51]. The gene discussed is GCG; the disease is Insulin resistance.