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zoom RSS 紅茶とコーヒーを飲む人は糖尿病になりにくい?

<<   作成日時 : 2010/01/01 23:52   >>

なるほど(納得、参考になった、ヘー) ブログ気持玉 5 / トラックバック 1 / コメント 0

 紅茶とコーヒーを飲む人はU型糖尿病のリスクが低い。カフェイン抜きのコーヒーが最も大きな効果があるという。総勢約50万人に対する18の研究を調査したところ、1日に3〜4杯の紅茶やコーヒーを飲むと、1/5以上リスクが低下する。カフェイン抜きのコーヒーでは1/3リスクが低下する。
 U型糖尿病は40才以降に発病し、インシュリンが十分でないか上手く働かないと起こる。健康的な食事や運動により治療するが、薬物やインシュリンも使用される。
 コーヒーや紅茶に含まれるマグネシウムや抗酸化剤のリグナン クロロゲン酸 などが関連している可能性がある。
(書きかけ)
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Page last updated at 00:00 GMT, Tuesday, 15 December 2009
Drinking cups of tea and coffee 'can prevent diabetes'
http://news.bbc.co.uk/2/hi/health/8411605.stm

画像Woman drinking from a mug
Three to four cups a day appeared to offer some protection

Tea and coffee drinkers have a lower risk of developing type 2 diabetes, a large body of evidence shows.

And the protection may not be down to caffeine since decaf coffee has the greatest effect, say researchers in Archives of Internal Medicine.

They looked at 18 separate studies involving nearly 500,000 people.

This analysis revealed that people who drink three or four cups of coffee or tea a day cut their risk by a fifth or more, say researchers.

The same amount of decaffeinated coffee had an even bigger effect, lowering risk by a third.

Type 2 diabetes usually starts after the age of 40 and develops when the body can still make some insulin, but not enough, or when the insulin that is produced does not work properly. Type 2 diabetes is treated with a healthy diet and increased physical activity. In addition to this, medication and/or insulin is often required.

The identification of the active components of these beverages would open up new therapeutic pathways for the primary prevention of diabetes mellitus
The study authors

If the findings prove true, doctors may well start advising people to put the kettle on as well as take more exercise and watch their weight, say the researchers.

When the authors combined and analysed the data, they found that each additional cup of coffee consumed in a day cut diabetes risk by 7%.

Lead researcher Dr Rachel Huxley, from the University of Sydney in Australia, said because of the finding with decaffeinated coffee, the link is unlikely to be solely related to caffeine.

Instead, other compounds in coffee and tea - including magnesium and antioxidants known as lignans or chlorogenic acids - may be involved.

Special brew

"The identification of the active components of these beverages would open up new therapeutic pathways for the primary prevention of diabetes mellitus.

"If such beneficial effects were observed in interventional trials to be real, the implications for the millions of individuals who have diabetes mellitus, or who are at future risk of developing it, would be substantial."

Dr Victoria King, of Diabetes UK, said: "Without full information about what other factors may be influencing the type 2 diabetes risk of the studies' participants - such as their physical activity levels and diet - as well as what the active ingredient in tea or coffee appears to be, we cannot be sure what, if anything, this observed effect is down to.

"What we can be sure of is that the development of type 2 diabetes is strongly linked to lifestyle, which means that many cases could be prevented by keeping active and eating a healthy balanced diet that is low in fat, salt and sugar with plenty of fruit and vegetables."

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Coffee, Decaffeinated Coffee, and Tea Consumption in Relation to Incident Type 2 Diabetes Mellitus

A Systematic Review With Meta-analysis

Rachel Huxley, DPhil; Crystal Man Ying Lee, PhD; Federica Barzi, PhD; Leif Timmermeister; Sebastien Czernichow, MD, PhD; Vlado Perkovic, MD, PhD; Diederick E. Grobbee, MD, PhD; David Batty, PhD; Mark Woodward, PhD

Arch Intern Med. 2009;169(22):2053-2063.

Background Coffee consumption has been reported to be inversely associated with risk of type 2 diabetes mellitus. Similar associations have also been reported for decaffeinated coffee and tea. We report herein the findings of meta-analyses for the association between coffee, decaffeinated coffee, and tea consumption with risk of diabetes.

Methods Relevant studies were identified through search engines using a combined text word and MeSH (Medical Subject Headings) search strategy. Prospective studies that reported an estimate of the association between coffee, decaffeinated coffee, or tea with incident diabetes between 1966 and July 2009.

Results Data from 18 studies with information on 457 922 participants reported on the association between coffee consumption and diabetes. Six (N = 225 516) and 7 studies (N = 286 701) also reported estimates of the association between decaffeinated coffee and tea with diabetes, respectively. We found an inverse log-linear relationship between coffee consumption and subsequent risk of diabetes such that every additional cup of coffee consumed in a day was associated with a 7% reduction in the excess risk of diabetes relative risk, 0.93 [95% confidence interval, 0.91-0.95]) after adjustment for potential confounders.

Conclusions Owing to the presence of small-study bias, our results may represent an overestimate of the true magnitude of the association. Similar significant and inverse associations were observed with decaffeinated coffee and tea and risk of incident diabetes. High intakes of coffee, decaffeinated coffee, and tea are associated with reduced risk of diabetes. The putative protective effects of these beverages warrant further investigation in randomized trials.

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紅茶とコーヒーを飲む人は糖尿病になりにくい? ・・・医師の一分さん
紅茶とコーヒーを飲む人は糖尿病になりにくい? http://kurie.at.webry.info/201001/article_1.html  紅茶とコーヒーを飲む人はU型糖尿病のリスクが低い。カフェイン抜きのコーヒーが最も大きな効果があるという。総勢約50万人に対する18の研究を調査したところ、1日に3〜4杯の紅茶やコーヒーを飲むと、1/5以上リスクが低下する。カフェイン抜きのコーヒーでは1/3リスクが低下する。  U型糖尿病は40才以降に発病し、インシュリンが十分でないか上手... ...続きを見る
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2010/01/02 14:04

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