Phase 2 detoxification enzymes are produced by the liver and include glutathione S-transferase and quinone reductase.

Reactions in the body that are catalyzed by phase 2 enzymes promote the elimination of drugs, toxins and cancer-causing agents. Because of this, phase 2 detoxifying enzymes may help to reduce free radical damage that leads to premature aging and also help ward off cancer.

References

Munday R, Munday CM. Induction of phase II enzymes by aliphatic sulfides derived from garlic and onions: an overview. Methods Enzymol. 2004;382:449-456. Jeong WS, Jun M, Kong AN.Nrf2: a potential molecular target for cancer chemoprevention by natural compounds.Antioxid Redox Signal. 2006 Jan-Feb;8(1-2):99-106.Zhang Y, Yao S, Li J.Vegetable-derived isothiocyanates: anti-proliferative activity and mechanism of action.Proc Nutr Soc. 2006 Feb;65(1):68-75