NO2 and NO3 levels in asthmatic animals treated with all concentrations of P. oleracea, SOD and CAT levels in groups treated with the two higher concentrations and MDA and thiol levels in the group treated with the highest concentration of P. oleracea, were significantly improved compared to those of untreated asthma group (p < 0.05 to p < 0.001; Figures 3 and 4). Here, SOD1 is linked to asthma.