Fig. (7) Effect of administration of Carbon tetrachloride (CCl₄), ferulic acid, ferulic maleate and phthalate on superoxide dismutase (SOD) levels of rat liver [A] and plasma [B]. Data are expressed as the mean ± SEM (n=5). β is significant at p<0.001 and γ at p<0.0001 versus CCl₄ and/or CCl₄ + FA (40 mg/kg bw).