Tea polyphenol, also known as vitamin polyphenol, is a kind of fused-ring

aromatic hydrocarbon, which is the general name of polyphenols in tea,

including flavanols, anthocyanins, flavonoids, flavonols and phenolic acids.

Among them, flavanols (catechins) are the most important, accounting for

about 70% of the total tea polyphenols. Tea polyphenols are one of the main

components that form the color and aroma of tea, and are also one of the

main components that have health care functions in tea. Tea also contains

phenols, which together with polyphenols are called phenolic content in tea.