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PMRP increased the antioxidant ability of the aged rat skins. The level of SOD, GSH-Px, CAT (a), and MDA (b) of the aged rat skins was measured among different groups. The means ± SD of three independent samples are shown. The expression levels among the different groups were determined by one-way ANOVA. The difference is significantly different (p < 0.05) where the letters over the bars are different.
