12 January - 20 June 2016

Effects of green tea on glucose control

17 July 13

A literature study and meta analysis of 17 separate controlled trials of the effects of green tea on glucose control and insulin sensitivity has concluded that green tea has favourable effects, ie, decreased fasting glucose and hemoglobin A1c concentrations.  In undertaking the study, published in the American Journal of Clinical Nutrition, the authors from Chongqing Medical University in China note that diabetes mellitus is currently one of the world's most significant public health challenges. The number of people with diabetes mellitus has more than doubled globally over the past 3 decades. Individuals with impaired fasting glucose or impaired glucose tolerance are usually considered to have a high future risk of developing type 2 diabetes mellitus T2DM. Furthermore, lifestyle interventions in overweight individuals with impaired glucose tolerance are most effective in those with high baseline T2DM risk. The report's authors state that results of human clinical trials investigating the effect of green tea and green tea extract on glucose control and insulin sensitivity have been inconsistent, and the sample sizes were relatively modest. Therefore, they conducted a meta-analysis of all published randomized controlled trials (RCTs) to quantitatively assess the effect of green tea on measures of glucose control and insulin sensitivity. Seventeen trials comprising a total of 1133 subjects were included in the current meta-analysis, which concluded that green tea consumption significantly reduced the fasting glucose and hemoglobin A1c (Hb A1c) concentrations by 20.09 mmol/L and 20.30% respectively. Further stratified analyses showed that green tea significantly reduced fasting insulin concentrations.

RSSL's Functional Ingredients Laboratory can analyse green tea for catechins, including epigallocatechin-gallate (EGCG) and epigallocatechin (EGC). For more information please contact Customer Services on Freephone 0800 243482 or email enquiries@rssl.com

share this article
RSSL endeavours to check the veracity of news stories cited in this free e-mail bulletin by referring to the primary source, but cannot be held responsible for inaccuracies in the articles so published. RSSL provides links to other World Wide Web sites as a convenience to users, but cannot be held responsible for the content or availability of these sites. This document may be copied and distributed provided the source is cited as RSSL's Food e-News and the information so distributed is not used for profit.

Previous editions

Load more editions

Make an Enquiry