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【科普】可可,而不是茶,与血压降低有关
Cocoa But Not Tea Linked To Blood Pressure Reduction
Article Date: 10 Apr 2007 - 4:00 PDT
A German study suggests there is evidence that cocoa but not tea is linked to blood pressure reduction.
The study is published in the American Medical Association journal Archives of Internal Medicine.
Dr Dirk Taubert and colleagues from the Department of Pharmacology at the University Hospital of Cologne, Germany, reviewed the medical literature for dietary effects of cocoa and black and green tea on blood pressure over the last 40 years.
They specifically searched for trials involving 10 or more adults that examined the before and after effects of consuming cocoa, black or green tea for at least 7 days on systolic (when the heart pumps, the higher reading) and diastolic (when the heart relaxes, the lower reading) blood pressure.
Looking at cocoa, they selected 5 randomized controlled trials on cocoa on a total of 173 people lasting for a median duration of 2 weeks. On analyzing the data from these trials they discovered that:
-- The pooled mean systolic blood pressure for the cocoa consumers was 4.7 mm of mercury lower than for the non-cocoa consumers.
-- The diastolic figure was 2.8 mm lower.
-- These effects were sufficiently significant to show that cocoa was linked to reduced blood pressure.
Looking at tea, they selected 5 controlled trials covering a total of 343 people that lasted for a median duration of 4 weeks. The analysis on the tea trials showed that:
-- The pooled mean systolic blood pressure for the tea consumers was 0.4 mm of mercury lower than for the non-tea consumers.
-- The diastolic figure was 0.6 mm lower.
-- These effects were not significant enough to show that tea was linked to decrease in blood pressure.
The researchers concluded that "Current randomized dietary studies indicate that consumption of foods rich in cocoa may reduce blood pressure, while tea intake appears to have no effect".
Dr Taubert speculated that the flavonoid content of cocoa is probably the most likely explanation for the effect on blood pressure.
He was cautious to point out that the specific studies they investigated were of short duration, looking at before and after effects, under controlled conditions.
It does not necessarily mean that eating a little bit of chocolate every day will lower your blood pressure. There are many other factors to consider, for instance the calories consumed, and whether the chocolate that you eat or drink is rich in flavonoids.
Manufacturers of chocolate often remove the flavonoids because they make the chocolate taste bitter. Also, the effect of milk or sugar being present in the chocolate was not examined in this research. 本人已认领该文编译，48小时后若未提交译文，请其他战友自由认领 A German study suggests there is evidence that cocoa but not tea is linked to blood pressure reduction.
一项来自德国的研究表明：有证据显示是可可而并非茶与血压降低有关。
The study is published in the American Medical Association journal Archives of Internal Medicine.
该研究结果公布在美国医学会杂志内科学卷中。
Dr Dirk Taubert and colleagues from the Department of Pharmacology at the University Hospital of Cologne, Germany, reviewed the medical literature for dietary effects of cocoa and black and green tea on blood pressure over the last 40 years.
来自科隆大学医院药学系的Dirk Taubert博士和他的同事查阅了近四十年来关于可可及红茶、绿茶对血压降低效应的医学文献。
They specifically searched for trials involving 10 or more adults that examined the before and after effects of consuming cocoa, black or green tea for at least 7 days on systolic (when the heart pumps, the higher reading) and diastolic (when the heart relaxes, the lower reading) blood pressure.
他们这种查阅了参加者在10人以上的试验研究，这些试验都是关于食用可可、红茶和绿茶后至少七天内与服用前收缩压的变化。
Looking at cocoa, they selected 5 randomized controlled trials on cocoa on a total of 173 people lasting for a median duration of 2 weeks. On analyzing the data from these trials they discovered that:
关于可可，他们选择了5个随机对照试验，总共受试者达173人，平均研究时间为2周。经过研究他们得出如下结论。
-- The pooled mean systolic blood pressure for the cocoa consumers was 4.7 mm of mercury lower than for the non-cocoa consumers.
-- The diastolic figure was 2.8 mm lower.
-- These effects were sufficiently significant to show that cocoa was linked to reduced blood pressure.
服用可可组的混和平均收缩压比对照组低4.7mmHg,舒张压降低2.8 mmHg，这些充分证明可可与血压降低有关。
Looking at tea, they selected 5 controlled trials covering a total of 343 people that lasted for a median duration of 4 weeks. The analysis on the tea trials showed that:
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作者:admin@医学,生命科学 2011-04-07 05:11
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