Fig. 5

BPH may cause changes in intestinal metabolites. a PCA of positive ion compounds. Each point represents a sample, and different groups are marked with different colors. b Volcano map of different metabolites (positive ion compound): Blue represents the down-regulated differential metabolite, red represent the up-regulated differential metabolite, and metabolites without difference are labeled gray. c Cluster analysis of differential metabolites (positive ion compound): Each row in the figure represents a differential metabolite, and each column represents a sample. The color represents the expression level, and the green to red corresponds to the expression level from low to high. BPH: benign prostatic hyperplasia, PCA: principal component analysis