Malondialdehyde (MDA) and conjugated dienes (CD) levels in liver of rat treated or not with 2,4-D under effects of supplemented extra virgin olive oil (EVOO) and its fractions (OOHF and OOLF). C: controls group, D: 2, 4-D treated group, D/EVOO: 2, 4-D + extra virgin olive oil, D/OOHF: 2, 4-D+ hydrophilic fraction, D/OOLF: 2,4-D+ lipophilic fraction, EVOO: extra virgin olive oil treated group alone, OOHF: group treated with hydrophilic fraction of olive oil, OOLF: group treated with lipophilic fraction of olive oil. Data are expressed as means ± SD (n = 10 rats per group). Comparison between groups was made using unpaired Student t test. * p < .05 vs 2,4-D group; § p < .05 vs control group.