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Effect of purple sweet potato color (PSPC) on the step‐through latency in D‐galactose (D‐gal)‐treated old mice (n = 8). All values are expressed as means ± standard deviation. *P < 0.05 vs. control group; #P < 0.05 vs. D‐gal group; +P < 0.05 D‐gal/PSPC group vs. D‐gal/PSPC/LY294002 group.
