Fig. (6) Effect of administration of Carbon tetrachloride (CCl₄), ferulic acid, ferulic maleate and phthalate on reduced glutathione (GSH) levels of rat liver [A] and plasma [B]. Data are expressed as the mean ± SEM (n=5). α is significant at p<0.05 and β at p<0.001 versus CCl₄ + FA (40 mg/kg bw).