Figure 5. Protective effects of vitexin on HUVEC viability against oxidative injury induced by 180 µM H₂O₂. HUVEC were co-treated with 10-400 µM vitexin for 24 hours. Values are means ± SEM of six independent experiments. (##) p < 0.01 vs. control group; (*) p < 0.05 vs. H₂O₂ only group; (**) p < 0.01 vs. H₂O₂ only group.