Fig. 1

NMDS plots of dissimilarity metrics comparing the profiles of gut microbiota, SCFAs and bioamines among groups. a SCFA profile based on Bray–Curtis dissimilarities. b Bioamine profile based on Bray–Curtis dissimilarities. c Gut microbiota structure based on Jaccard dissimilarities. d Gut microbiota structure based on Bray–Curtis dissimilarities