Green Tea Consumption And Liver Disease

February 24, 2009 by  
Filed under All, Science, Tea

Just to keep things in perspective, the previous item about green
tea extracts potentially causing liver problems must be balanced
against research showing that green tea is protective against liver
disease. Chinese researchers a value weighted interventional and
observational studies in both Western countries and in China published
between 1989 and 2007. They found “a significant protective role
of green tea against various liver diseases” and “a
positive correlation between green tea intake and attenuation of liver
disease.” Their conclusion? “An increased consumption of
green tea may reduce the risk of liver disease.”

Green tea consumption and liver disease: a systematic review. Liver Int. 2008 May 14. [Epub ahead of print]
Jin X, Zheng RH, Li YM.

Objectives: To present the effect of green tea consumption against
liver disease. Data sources: Interventional and observational studies
both in Western countries and in China and published between the years
1989 and December 2007. Review Methods: The articles were retrieved
from Medline, Embase database, Chinese biomedicine web database and
Chinese scientific journal’s database using proper MESH headings
and assessed by two independent investigators according to established
inclusion criteria. The characteristics and outcomes of the chosen
articles were displayed for further analysis and the quality of each
study was also evaluated according to the widely acknowledged criteria.
P<0.05 was defined as statistically significant in all enrolled
trials. Results: Ten qualified studies (eight from China, one from
Japan and the other from the USA) with various outcomes such as liver
cancer, cirrhosis and fatty liver disease were finally chosen. Among
them, study designs differed in that there were four
randomized-controlled clinical trials, two cohort, one case-control and
three cross-sectional studies. The heterogeneity in the study design,
outcomes, cofounders and amount of tea consumption precluded further
meta-analysis. Nevertheless, eight studies showed a significant
protective role of green tea against various liver diseases as
determined by relative risk/odds ratio or P-value and among them, four
studies showed a positive correlation between green tea intake and
attenuation of liver disease. Moreover, the other two studies also
presented the protective tendency of green tea against liver disease.
Conclusions: An increased consumption of green tea may reduce the risk
of liver disease.

Tags:

Speak Your Mind

Tell us what you're thinking...
and oh, if you want a pic to show with your comment, go get a gravatar!