PON1 and myocardial infarction: For the HP-EVOO group, serum PON-1 activity was significantly higher in healthy (mean: 92.84 ± 27.53 U/mL) participants compared to post-MI patients (mean: 33.86 ± 8.55 U/mL), both at baseline (p = 0.020) and after the intervention (healthy participants mean: 92.84 ± 26.05 U/mL, post-MI patients mean: 37.54 ± 8.27 U/mL, p = 0.021).