Levels of total antioxidant capacity (standardized reductive capacity—mM Trolox/mM creatinine) of non-barbers and barbers at baseline, after NAC treatment.

<p>NAC treated non-barbers showed higher total antioxidant capacity than control non-barbers, or NAC treated barbers at the end of the study. (Orange bars: animals classified as non-barbers at the beginning of the study. Blue bars: animals classified as barbers at the beginning of the study. Open bars: control mice. Hashed bars: NAC treated mice).