The SAV effects on gut microbiota composition and microbial community functions prediction. (A) Venn diagram. (B) The PCA plots. (C) Composition of microbial at phylum level. (D) Relative abundances of bacterial taxa at genus level. (E) Relative abundances of Firmicutes, Bacteroidetes, Verrucomicrobia, and the ratio of F/B. (F) Relative abundances of Lachnospiraceae_NK4A136_group, Akkermansia, Alloprevotella, Oscillibacter, Hungatella, Alistipes.