Figure 2. Classification of metabolites detected from mice and pellets.

The metabolites in each group are classified as follows: (A) Metabolites produced by host and absorbed/hydrolyzed by colonic microbiota. (B) Metabolites produced by host or derived from pellet and absorbed/hydrolyzed by colonic microbiota. (C) Metabolites produced by host and not influenced by colonic microbiota. (D) Metabolites produced by host or derived from pellet and not influenced by colonic microbiota. (E) Metabolites produced by colonic microbiota. (F) Metabolites produced by colonic microbiota or derived from pellet and the absorption of which was possibly inhibited in the colon. (G) Ingredients in the pellet absorbed by the host.