Fig. 7

B. longum strains with specific genotypes can significantly reverse oxidative damage in aging mice. Oxidative parameters in brain tissue (A-D). Oxidative parameters in liver tissue (E-H). PCA plot based on all behavioral and oxidative data as the inputs (I). The normal distribution of all data was confirmed using the Kolmogorov–Smirnov (KS) normality test. All data were analyzed using one-way ANOVA and are presented as the means ± standard errors of the means; n ≥ 3 for each group. Arg, Arginine group. Statistical significance was calculated for the comparisons between the aging group and the control group (*s in green color), and for the comparisons between the aging group and each of strain treatment groups (*s in the other colors). *P < 0.05, **P < 0.01, ***P < 0.001