Extraction and purification technologies of green tea polyphenols and its pharmacological actions

Green tea polyphenols,which are major chemical constituents from green tea,have great pharmacological actions,such as antioxidant,anticancer,anti-obesity,anti-UV,against dental caries,improving cardiovascular function and neurodegenerative diseases.This review focused on the advances on extraction,purification technologies and pharmacological actions of green tea polyphenols in recent years.