茶Catechin

Tea Catechins, traditionally called tea tannin, contents 65%-80% in Tea Polyphenol, is the special component of tea leaf with bitter and acerbic taste as well as astringency. It has the effects of resisting oxidation, resisting mutation, preventing tumor, resisting AIDS virus, lowering blood cholesterol, decreasing lipoprotein of low density, inhibiting hyperpressure, inhibiting the congealing of blood platelet, controlling bacteria, and preventing allergy etc. They are stronger active materials formed with catechin as the main structure combined with gallic acid group. Those of them exist in green tea are mainly (-)-epigallocatechin gallate (EGCG), (-)-epigallocatechin (EGC), (-)-epicatechin gallate (ECG), (+)-epicatechin (EC), (-)-gallocatechin gallate (GCG), and (-)-catechin. The catechin mainly exists in black tea is theaflavin, which is a doubly condensed catechin substance based on (-)-epigallocatechin-3-gallate (EGCG). The theaflvin has 4 isomers, which are theaflavin-3-gallate, theaflavin-3'-gallate, theaflavin-3, 3'-digallate and theaflavin. The catechin substances exist in Oolong tea are mainly catechin itself and catechin oligomer. Main Ingredientes of Tea Catechines: EGCG ( Epigallocatechin gallate ) EGCG is a kind of component extracted from the Chinese green tea. It is the mainly active and water-soluble component from green tea... EC ( Epicatechin ) EC is another kind of potent components extracted from the Chinese green tea. It has the similar activity to EGCG,and its antioxidant activity is a little lower than that of EGCG... ECG ( Epicatechin gallate )EGC ( Epigallocatechin )GCG ( Gallocatechin gallate )