Tea polyphenols refer to different chemical compounds, such as catechins, theaflavins, tannins, and flavonoids, which are discovered in tea leaves naturally. These compounds are a high source of antioxidants and can help in minimizing the growth of bacteria in the stomach and reducing the risks of coronary artery disease, neurodegenerative diseases, fight against cancer problems, control diabetes, and support in preventing aging-related disease and other medical illnesses. Furthermore, they are generally discovered in diversified proportions in numerous tea variants (black, green, white, and oolong) and can largely affect the distinctive aroma and taste of the beverage. Additionally, they are also applied in processing meat, plant- and fish-based products. Tea polyphenols provide mouthfeel and flavor to tea leaves.