Catechins are a type of natural antioxidant found primarily in green tea, but they are also present in other foods like dark chocolate and certain fruits. These compounds belong to a group called flavonoids, which are known for their health benefits, including reducing inflammation and improving heart health. Research suggests that catechins may help in weight management and enhance metabolic rates. They are also studied for their potential role in reducing the risk of chronic diseases, such as diabetes and certain types of cancer, due to their ability to combat oxidative stress in the body.