Ar-turmerone is a major sesquiterpenoid ketone present in turmeric (Curcuma longa) essential oil, contributing to its characteristic aroma. It possesses anti-inflammatory, antioxidant, and potential neuroprotective activities, with research indicating benefits for brain health and anti-cancer properties. As a lipophilic compound, it is extracted via steam distillation and used in flavorings and traditional medicine. Its structure features a p-methylphenyl group attached to a heptenone chain, making it chemically stable under normal conditions but sensitive to oxidation.