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The overlapping effect of NAC and DR on lifespan extension. Dietary supplementation with NAC or DR using bacterial dilution significantly increases both mean and maximum lifespan in wild-type controls (n = 60). The control group is fed 5 × 109 cells/ml bacteria, and the DR group is fed 5 × 108 cells/ml bacteria. There was no additional increase in lifespan by the combined intervention of NAC and DR compared to the lifespan of worms treated with either NAC or DR alone (p > 0.05)
