Oxidized ethyl linoleate (OEL) was prepared by aeration at low temperature. Peroxide value (POV, mEq/kg lipid) of OEL was 1400; the major oxidized compounds were 9-hydroperoxy-cis, trans- and 13-hydroperoxy-trans, cis-octadecadienoate. Rats fed fiber-free or sugar-beet fiber (SBF, 100g/kg diet)