Used for the quantitative detection of plant tea polyphenols in various samples such as plant extracts, tea products, and biological fluids. The kit is widely applied in agricultural research, food quality control, and pharmacological studies to assess polyphenol content, which is linked to antioxidant activity. It enables high-throughput analysis in laboratories studying plant metabolism, functional foods, and natural product efficacy. The assay supports research into health benefits of tea compounds, including their roles in reducing oxidative stress and inflammation.