The present application describes a method of eliminating gallated catechins, especially epigallocatechin gallate (EGCG), epicatechin gallate (ECG), as well as parathion, from green tea extraction by using at least one out of ethyl acetate, Cetyl Trimethyl Ammonium Bromide (CTAB), cation exchange resin, anion exchange resin, C 18 bead, PEG bead and mPEG. And also, this method can be applied in the method of adding at least one of pre-mentioned components, when green tea is directly ingested in the form of an extract solution, leaf or powder. This is to be useful for people with metabolic disorders such as diabetes and obesity because of the resolved toxicity. This method is to maximize the beneficial luminal effect and to minimize the harmful circulatory effect of gallated catechins.
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