医師の一分

アクセスカウンタ

zoom RSS 週に2-3度ダークチョコレートを食べる中高年の女性は心不全になりにくい

<<   作成日時 : 2010/08/26 23:16   >>

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

 1週間に2-3度ダーク・チョコレートを食べる中高年の女性は心不全を起こすリスクが1/3小さいという。しかし、毎日食べるとリスクは軽減されなかった。
 48-83才の約32,000人のスウェーデン女性を調査した研究で、1週間にダーク・チョコレートを1-2回分相当、19-30gを食べると心不全リスクが32%減少し、1ヶ月に1-3回相当では26%減少であった。毎日食べるとリスク減少は見られなかった。
 チョコレートには糖と脂肪が多く含まれるため、多く食べると体に良くないが、血圧を低下させて心疾患を防ぐフラボノイドを多量に含んでいる。心不全に関連した長期効果を示した研究は今までなかった。
 スウェーデン女性が食べたチョコレートはミルクチョコレートだったが、約30%の高濃度のココアを含み、英国の基準ではダーク・チョコレートと等しい。
 ミルクチョコレートは25%以下だが、ダーク・チョコレートは多いものは75%ものココアを含む。
--------------------------
チョコレートの科学
http://kurie.at.webry.info/201006/article_3.html
チョコレートで脳出血を予防
http://kurie.at.webry.info/201003/article_13.html
赤ワインの後にチョコレート・ミルクを飲む
http://kurie.at.webry.info/200911/article_15.html
ダークチョコレートに住む悪魔
http://kurie.at.webry.info/200712/article_44.html
---------------------------------------------------
16 August 2010 Last updated at 20:08 GMT
Dark chocolate can be good for the heart, study says
http://www.bbc.co.uk/news/health-10986625

画像Older women who eat dark chocolate once or twice a week could be lowering their risk of heart failure, says a US study.

It found those eating chocolate once or twice a week cut the risk of developing heart failure by a third, but those eating it every day did not benefit.

The Boston study, in a journal of the American Heart Association, looked at nearly 32,000 Swedish women aged between 48 and 83 over nine years.

Dieticians say eating chocolate too often can be damaging and unhealthy.

The study notes that one or two 19 to 30 gram servings of dark chocolate a week led to a 32% reduction in heart failure risk.

This fell to 26% when one to three servings a month were eaten.

But those who ate chocolate every day did not appear to reduce their risk of heart failure at all.

The researchers conclude the protective effect of eating chocolate reduces as more or less is eaten than the optimum one to two servings a week.
'Flavanoids'

Too much chocolate is unhealthy because it contains high levels of sugar and fat which can make people put on weight, the researchers say.

But chocolate also contains high concentration of compounds called flavonoids which can lower blood pressure and protect against heart disease, previous studies have found.

The researchers behind this study say this is the first time long-term effects related specifically to heart failure have been shown.

Dr Murray Mittleman is study leader and director of the Cardiovascular Epidemiology Research Unit at the Beth Israel Deaconess Medical Centre in Boston.

He said: "You can't ignore that chocolate is a relatively calorie-dense food and large amounts of habitual consumption is going to raise your risks for weight gain.

"But if you're going to have a treat, dark chocolate is probably a good choice, as long as it's in moderation," Dr Mittleman said.
Cocoa content

Differences in chocolate quality will affect the study's implications, the authors say. Higher cocoa content is associated with greater heart benefits.

Although the chocolate consumed by the Swedish women in the study was milk chocolate, it contained a high concentration of cocoa solids - about 30%.

This is equivalent to dark chocolate by UK standards.

Dark chocolate can contain as much as 75% cocoa while standard milk chocolate may have 25% or less cocoa.

Victoria Taylor, senior dietitian at the British Heart Foundation, said the study showed the importance of finding the right balance in our diets.

"Before you rip open those sweet treats, remember that whilst antioxidants in chocolate may be helpful to your heart, they can also be found in fruit and veg - foods which don't come with the saturated fat and high calories that chocolate does," she said.

---------------------------------------------------
Chocolate Intake and Incidence of Heart Failure: A Population-Based, Prospective Study of Middle-Aged and Elderly Women
Elizabeth Mostofsky1; Emily B. Levitan1; Alicja Wolk2 and Murray A. Mittleman1,3

1 Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA;
2 Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden

* Corresponding author; email: mmittlem@bidmc.harvard.edu

Background―Randomized clinical trials have shown that chocolate intake reduces systolic and diastolic blood pressure and observational studies have found an inverse association between chocolate intake and cardiovascular disease. The aim of this study was to investigate the association between chocolate intake and incidence of heart failure (HF).

Methods and Results―We conducted a prospective cohort study of 31,823 women 48-83 years old without baseline diabetes or a history of HF or myocardial infarction who were participants in the Swedish Mammography Cohort. In addition to health and lifestyle questions, participants completed a food-frequency questionnaire. Women were followed from January 1, 1998 through December 31, 2006 for HF hospitalization or death through the Swedish inpatient and cause-of-death registers. Over 9 years of follow-up, 419 women were hospitalized for incident HF (n =379) or died of HF (n = 40). Compared to no regular chocolate intake, the multivariate-adjusted rate ratio of HF was 0.74 (95%CI 0.58-0.95) for those consuming 1-3 servings of chocolate per month, 0.68 (95%CI 0.50-0.93) for those consuming 1-2 servings per week, 1.09 (95%CI .74-1.62) for those consuming 3-6 servings per week and 1.23 (95%CI 0.73-2.08) for those consuming one or more servings per day (p for quadratic trend = 0.0005).

Conclusions―In this population, moderate habitual chocolate intake was associated with a lower rate of HF hospitalization or death but the protective association was not observed with intake of one or more servings per day.

Key Words: diet . epidemiology . heart failure

テーマ

関連テーマ 一覧


月別リンク

ブログ気持玉

クリックして気持ちを伝えよう!
ログインしてクリックすれば、自分のブログへのリンクが付きます。
→ログインへ
気持玉数 : 1
なるほど(納得、参考になった、ヘー)

トラックバック(0件)

タイトル (本文) ブログ名/日時

トラックバック用URL help


自分のブログにトラックバック記事作成(会員用) help

タイトル
本 文

コメント(0件)

内 容 ニックネーム/日時

コメントする help

ニックネーム
本 文
週に2-3度ダークチョコレートを食べる中高年の女性は心不全になりにくい 医師の一分/BIGLOBEウェブリブログ
文字サイズ:       閉じる