Ethoxyquin acts as a synthetic antioxidant which inhibits chemically induced carcinogenesis, where it exerts its chemopreventive action by inducing glutathione synthetase and the phase II drug metabolizing enzyme, glutathione S-transferase (GST).;Ethoxyquin acts as a synthetic antioxidant which inhibits chemically induced carcinogenesis, where it exerts its chemopreventive action by inducing glutathione synthetase and the phase II drug metabolizing enzyme, glutathione S-transferase (GST).A synthetic antioxidant which inhibits chemically induced carcinogenesis.