A literature review on bioactive properties of betel leaf (Piper betel L.) and its applications in food industry

•Betel leaf (Piper betel L.) is a popular ingredient in many traditional cuisines, and is known for its distinctive flavor, aroma, and medicinal properties.•The leaves are also used for medicinal purposes, including to treat gastrointestinal disorders, ease flatulence, and improve digestion.•Betel leaf has a number of potential health benefits, including antioxidant, anti-inflammatory, and antimicrobial properties.•These compounds may have numerous applications in the food industry, such as in food preservation, flavor enhancement, and the development of functional foods.