Featured Research

from universities, journals, and other organizations

Low prevalence of type 2 diabetes among regular black tea drinkers

Date:
November 7, 2012
Source:
BMJ-British Medical Journal
Summary:
The prevalence of type 2 diabetes is low in countries where consumption of black tea is high, suggests a mathematical analysis of data from 50 countries.

The prevalence of type 2 diabetes is low in countries where consumption of black tea is high, suggests a mathematical analysis of data from 50 countries, published in the online journal BMJ Open.

The global prevalence of type 2 diabetes has increased six-fold over the past few decades, and the International Diabetes Federation calculates that the number of those with the disease will soar from 285 million in 2010 to 438 million in 2030.

The authors systematically mined information on black (fermented) tea consumption in 50 countries across every continent, based on 2009 sales data collected by an independent specialist market research company.

And they analysed World Health Organization data for those same countries on the prevalence of respiratory, infectious, and cardiovascular diseases, as well as cancer and diabetes.

Ireland topped the league table for black tea drinkers, at more than 2 kg/year per person, closely followed by the UK and Turkey. At the bottom of the table were South Korea, Brazil, China, Morocco and Mexico, with very low consumption.

A statistical approach, called principal component analysis (PCA), was used to tease out the key contribution of black tea on each of the health indicators selected at the population level.

This showed an impact for black tea on rates of diabetes, but not on any of the other health indicators studied.

The link was confirmed with further statistical analysis, which pointed to a strong linear association between low rates of diabetes in countries where consumption of black tea is high.

The authors acknowledge several caveats to their findings, however.

They caution that the quality and consistency of data among all 50 countries are likely to vary, as will the criteria used to diagnose diabetes. And what may seem positive at the population level may not work as well as the individual level.

They also point out that various factors are likely to have contributed to the dramatic rise in diabetes prevalence, and that a link between black tea consumption and the prevalence of the disease does not imply that one is caused by the other.

But their findings do back those of previous research, they say.

"These original study results are consistent with previous biological, physiological, and ecological studies conducted on the potential of [black tea] on diabetes and obesity"…and they provide "valuable additional scientific information at the global level," they write.

In recent years, a great deal of interest has focused on the health benefits of green tea, which contains simple flavonoids called catechins, thought to have anti-inflammatory properties, say the authors.

But the fermentation process, which turns green tea black, induces a range of complex flavonoids, including theaflavins and thearubigins, to which several potential health benefits have been attributed, they add.


Story Source:

The above story is based on materials provided by BMJ-British Medical Journal. Note: Materials may be edited for content and length.


Cite This Page:

BMJ-British Medical Journal. "Low prevalence of type 2 diabetes among regular black tea drinkers." ScienceDaily. ScienceDaily, 7 November 2012. <www.sciencedaily.com/releases/2012/11/121107200148.htm>.
BMJ-British Medical Journal. (2012, November 7). Low prevalence of type 2 diabetes among regular black tea drinkers. ScienceDaily. Retrieved July 23, 2014 from www.sciencedaily.com/releases/2012/11/121107200148.htm
BMJ-British Medical Journal. "Low prevalence of type 2 diabetes among regular black tea drinkers." ScienceDaily. www.sciencedaily.com/releases/2012/11/121107200148.htm (accessed July 23, 2014).

Share This




More Health & Medicine News

Wednesday, July 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Idaho Boy Helps Brother With Disabilities Complete Triathlon

Idaho Boy Helps Brother With Disabilities Complete Triathlon

Newsy (July 23, 2014) An 8-year-old boy helped his younger brother, who has a rare genetic condition that's confined him to a wheelchair, finish a triathlon. Video provided by Newsy
Powered by NewsLook.com
Thousands Who Can't Afford Medical Care Flock to Free US Clinic

Thousands Who Can't Afford Medical Care Flock to Free US Clinic

AFP (July 23, 2014) America may be the world’s richest country, but in terms of healthcare, the World Health Organisation ranks it 37th. Thousands turned out for a free clinic run by "Remote Area Medical" with a visit from the Governor of Virginia. Duration: 2:40 Video provided by AFP
Powered by NewsLook.com
Stone Fruit Listeria Scare Causes Sweeping Recall

Stone Fruit Listeria Scare Causes Sweeping Recall

Newsy (July 22, 2014) The Wawona Packing Company has issued a voluntary recall on the stone fruit it distributes due to a possible Listeria outbreak. Video provided by Newsy
Powered by NewsLook.com
Huge Schizophrenia Study Finds Dozens Of New Genetic Causes

Huge Schizophrenia Study Finds Dozens Of New Genetic Causes

Newsy (July 22, 2014) The 83 new genetic markers could open dozens of new avenues for schizophrenia treatment research. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins