Tea polyphenol (Standard) is the standard substance of Tea polyphenol, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. Tea polyphenol, also called green tea extract, are a mixture of chemical compounds, such as flavanoids and tannins, found naturally in tea. Polyphenols are powerful antioxidants, which can reduce the risk of developing coronary artery disease and a number