Catechin is a type of flavonoid, a class of compounds with antioxidant properties, primarily found in tea, cocoa, and various fruits. It plays a significant role in human health by providing protective effects against oxidative stress and inflammation. Catechins are known for their potential benefits in cardiovascular health, weight management, and metabolic syndrome. They contribute to the sensory characteristics of food, imparting astringency and bitterness. In culinary applications, catechin-rich ingredients are often used for their health benefits and flavor enhancement.