Aging reduces glutathione levels
Isogenic mutants deficient in the activities of thioredoxin (54), catalase (KatA) (55), NADPH quinone reductase (56), and superoxide dismutase (46) are sensitive to host colonization and susceptible to oxidative damage
doi:10.1128/jb.177.1.247-251.1995
You have probably heard the saying take one for the team. Instead of taking one for the team, antioxidants give one for the team. The giving is the donation of an electron from the antioxidant to a free radical, in order to regenerate a stable compound, as shown below
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(4) Dou Y, Lee A, Zhu L, Morton J, Ladiges W