Green tea catechins reduced the glycaemic potential of bread: an in vitro digestibility study

Royston Goh, Jing Gao, Victoria K Ananingsih, Dinesh Viren Ranawana, Christiani Jeyakumar Henry, Weibiao Zhou

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97 Citations (Scopus)


Green tea catechins are potent inhibitors of enzymes for carbohydrate digestion. However, the potential of developing low glycaemic index bakery food using green tea extract has not been investigated. Results of this study showed that addition of green tea extract (GTE) at 0.45%, 1%, and 2% concentration levels significantly reduced the glycaemic potential of baked and steamed bread. The average retention levels of catechins in the baked and steamed bread were 75.3-89.5% and 81.4-99.3%, respectively. Bread fortified with 2% GTE showed a significantly lower level of glucose release during the first 90 min of pancreatic digestion as well as a lower content of rapidly digested starch (RDS) content. A significantly negative correlation was found between the catechin retention level and the RDS content of bread. The potential of transforming bread into a low GI food using GTE fortification was proven to be promising.

Original languageEnglish
Pages (from-to)203-210
Number of pages8
JournalFood Chemistry
Early online date16 Feb 2015
Publication statusPublished - 1 Aug 2015

Bibliographical note

Copyright © 2015 Elsevier Ltd. All rights reserved.


  • green tea catechins
  • bread
  • in vitro digestibility
  • glycaemic potential


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