Glucoraphanin is a natural glycoinsolate found in cruciferous vegetables, including broccoli. It is converted to the isothiocyanate sulforaphane by the enzyme myrosinase. Sulforaphane has powerful antioxidant, anti-inflammatory, and anti-carcinogenic effects. It acts by activating nuclear factor erythroid 2-related factor 2 (Nrf2), which induces the expression of phase II detoxification enzymes.