METHOD OF PREPARING GREEN TEA WITH EXCELLENT SKIN-PROTECTIVE FUNCTIONALITY

摘要

PURPOSE: A producing method of green tea having skin condition improving functions is provided to improve an anti-wrinkle effect, a UV-screening effect, and a skin moisturizing effect of the green tea. CONSTITUTION: A producing method of green tea having skin condition improving functions comprises the following steps: grinding tea tree stems in acetone; filtering the ground tea tree stems to obtain residues to obtain a functionality enhancing composition; reacting the functionality enhancing composition with conventional green tea for 4 hours 30 minutes-7 hours 30 minutes in a reaction solvent at the pH of 5-7; extracting steam from the green tea by heating the green tea with distilled water; and adding an organic solvent containing n-pentane, diethyl ether, and ethanol to the steam for obtaining a substance having the elastase inhibiting activity, and concentrating the substance using a chromatography method.