Table 2.

Significantly increased (red) or decreased (blue) metabolite levels in rat plasma

SiO₂ nanoparticles: 1000 mg/kg body weight/day or Ag nanoparticles: 100 mg/kg body weight/day, mean values relative to vehicle controls (N = 5 per group, Welch t test; p < 0.05)

*Indicates gut microbiota-dependent metabolite