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Hydrogen peroxide (H2O2) is neutralized by the transfer of a single-electron from ascorbate- (Asc)-producing water and ascorbyl free radicals (AFR). The pairs of AFR form one molecule of dehydroascorbic acid (DHAA) and one Asc. The lactone ring of DHAA breaks down forming the inert products, diketogulonic acid, threonic acid, and oxalic acid; alternatively, DHAA can be reduced to the useful Asc.
