Glucoraphanin, the precursor of the widely extolled chemopreventive agent sulforaphane found in broccoli, has antioxidant activity.

Male C57BL/6JSlc mice are 7 weeks of age. The Nrf2 knockout (Nrf2?/?) mouse strain is used in the assay. After 1 week of acclimation, mice are fed normal chow (NC) (containing 2.2% dextrinized cornstarch, 10% kcal from fat), NC containing 0.3% glucoraphanin (NC-GR) (containing 2.2% extract powder), an HFD (containing 2.2% dextrinized cornstarch, 60% kcal from fat), or an HFD containing 0.3% glucoraphanin (HFD-GR) (containing 2.2% extract powder) for 14 weeks. Both the NC and the HFD containing cornstarch or glucoraphanin are prepared. All mice studied are maintained on a 12-h light/dark cycle at 24-26°C with free access to water and food [1].