Assertion: free catechin | /r/CapableOf | comprise about 25-40% egcg
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Source sentences:
text: To achieve the foregoing and other objects and in accordance with the purposes of the present invention, as embodied and broadly described therein, the method of this invention comprises contacting a plant material with a solvent thereby forming a crude extract, loading the crude extract onto a first column containing an adsorbent for specifically adsorbing catechins, removing extraneous materials by washing the adsorbent with specific solvents, and desorbing the catechins from the adsorbent using 100% food grade (95%) ethanol, wherein the fractions eluting from the column with 100% food grade ethanol contain caffeine-free mixed catechins comprise about 25-40% EGCG and are about 70-80% pure in catechins.