Apigenin is a naturally occurring flavonoid belonging to the flavone subclass, widely distributed in plants including parsley, celery, chamomile tea, and citrus fruits. It features a 2-phenylchromen-4-one backbone substituted with hydroxyl groups at the 4', 5, and 7 positions. Apigenin demonstrates antioxidant activity by scavenging free radicals, anti-inflammatory effects through inhibition of NF-κB and COX-2 pathways, and potential chemopreventive properties via induction of apoptosis and cell cycle arrest in cancer cells. It is lipophilic yet possesses moderate polarity due to its phenolic groups, allowing interaction with biological membranes and receptors. Extensive peer-reviewed studies explore its neuroprotective, cardioprotective, and metabolic regulatory roles, making it a common component in dietary supplements and functional foods.