Hepatic peroxisome proliferation (percent change from 0 mg/kg control) of male and female C57BL/6 mice orally exposed to (A): PFMOAA, (B): PFMOPrA, or (C): PFMOBA for 30 days. Acyl-CoA oxidase activity was measured in livers that had been collected from animals one day after exposure ended. n = 4–6/dose for PFMOAA, PFMOPrA, PFMOBA, and PFOA-positive control (note that the PFOA-positive control was included from animals evaluated in a separate PFAS study). No error bars are present due to how the data were calculated. Abbreviations: perfluoro-2-methoxyacetic acid (PFMOAA), perfluoro-2-methoxypropanoic acid (PFMOPrA), perfluoro-4-methoxybutanioc acid (PFMOBA), and perfluorooctanoic acid (PFOA). * p < 0.05 from same-sex control group.