Fig. 5

The modulation of 5-HTP on colon microbial community. (A) Chao1 index (B) Shannon index (C) The venn diagram between CON, 250 and 500 mg/kg groups. (D) Principal component analysis (PCA) in the CON, 250 and 500 mg/kg groups according to the Bray Curtis distance metric. Abbreviations: A: CON; B: 250 mg/kg; C: 500 mg/kg