Reversal of age-associated oxidative stress in mice by PFT, a novel kefir product.

Aged mice had a highly significant depletion ( P < 0.05) of GSH levels in the liver, brain, and serum in comparison with young mice ( Figure 4 ), but PFT treatment significantly increased the GSH level in aged mice as follows: liver 22%, brain 26%, and serum 67%.

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