since the same oil treatments inhibit dramatically the sharp decline in the intracellular ratio of reduced ( gsh ) /oxidized ( gssg ) glutathione caused by tpa , it is suggested that some of the inhibitory effects of garlic and onion oils on skin tumor promotion may result from their enhancement of the natural gsh-dependent antioxidant protective system of the epidermal cells .
C0061516
gssg
C0017817
gsh