FIGURE 2.

In vitro antioxidant activities of each experimental group. (A) hydroxyl (OH) radical; (B) 2, 2′-azino-bis (3-ethylbenzthiazoline-6-sulphonic acid) diammonium salt (ABTS) radical; (C) 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radical; (D) total antioxidant capacity. The data were calculated and analyzed using Pad Prism 7.0 (Graph Pad Software, La Jolla, CA, United States) software, group differences were also analyzed by one-way analysis of variance (ANOVA) followed by Duncan’s multiple comparison test. Values are expressed as mean ± standard deviation (N = 3/group). *p < 0.05; **p < 0.01; ***p < 0.001. NMN: nicotinamide mononucleotide solution (30 mg/ml); L: L. fermentum TKSN041 intracellular extract of 10⁹ cells; VC: ascorbic acid (0.2 mg/ml); NMN + L: nicotinamide mononucleotide soulution (30 mg/ml) combined with L. fermentum TKSN041 intracellular extract of 10⁹ cells.