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Chinese Science Bulletin

, Volume 48, Issue 4, pp 315–319 | Cite as

Antioxidant effects of green tea polyphenols

  • Baolu Zhao
Review

Abstract

The unprecedented interest in the antioxidant activity of green tea polyphenols (GTP) is due to the apparent health benefits of tea drinking and the experimental results with the polyphenols. The results suggest that the galloylated catechins show stronger antioxidant effect than that of nongalloylated catechins and the double bond in C ring also plays an important role in this effect. There are synergic effects between different catechins and the antioxidant effect of (+)-epimers is stronger than that of (−)-epimers. The active site to scavenge free radicals mainly locates in p-hydroxyl of phenol in gallic acid and hydroxyl of phenol in the pyrane also shows activity. The large π bond in chromane and benzene ring of catechin is the structure base for their antioxidant effects. The prevent effect of GTP against diseases and their redox regulation in cell signal pathway are very important to be studied in the future.

Keywords

green tea polyphenols (GTP) bioflavonoid natural anti-oxidant free radicals ESR 

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Copyright information

© Science in China Press 2003

Authors and Affiliations

  1. 1.Laboratory of Visual Information Processing, Research Centers of Brain and Cognitive ScienceInstitute of Biophysics, Chinese Academy of SciencesBeijingChina

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