Nobiletin is a flavonoid isolated from citrus peels. It is an O-methylated flavone that has the activity to rescue bulbectomy-induced memory impairment. Nobiletin is a flavonoid isolated from citrus peels. It is an O-methylated flavone that has the activity to rescue bulbectomy-induced memory impairment. Nobiletin was found to potentially inhibit cartilage degradation. Nobiletin was shown to augment AMPA receptor activity and long-term potentiation in cell culture. Synergistic chemopreventive effects of nobiletin and atorvastatin on colon carcinogenesis have been described.