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首页 » Eur J Nutr.:饮用樱桃汁有助睡眠

Eur J Nutr.:饮用樱桃汁有助睡眠

来源:新华网 2011-11-07 10:14

格林·霍华森教授

睡眠不好时,喝一杯樱桃汁或许有所帮助。英国研究人员日前完成的一项试验显示,樱桃汁在延长睡眠时间和改善睡眠质量两方面都有效果。

英国诺森布里亚大学的研究者在新一期《欧洲营养学杂志》上报告说,他们请20名志愿者参与试验,其中一部分人被要求每天喝两次30毫升的樱桃汁,持续一个星期。其他志愿者被编为对照组,不喝这种饮料。结果发现,前一组人每天的睡眠时间平均延长了25分钟,而且在他们睡眠时用监测仪获得的数据显示,其睡眠质量也有所改善。

研究人员认为,这与樱桃汁中含有名为褪黑激素的物质有关,这种物质能帮助睡眠。对饮用樱桃汁的志愿者进行的尿检也显示,其尿液中褪黑激素的含量明显比对照组要高。

领导这项研究的格林·霍华森说,试验表明樱桃汁有助于改善睡眠,失眠症患者和需要倒时差的人都可以尝试一下这种天然饮品。(生物谷 Bioon.com)

 

doi:10.1007/s00394-011-0263-7
PMC:
PMID: 22038497

Effect of tart cherry juice (Prunus cerasus) on melatonin levels and enhanced sleep quality.

Howatson G, Bell PG, Tallent J, Middleton B, McHugh MP, Ellis J.

BACKGROUND:

Tart Montmorency cherries have been reported to contain high levels of phytochemicals including melatonin, a molecule critical in regulating the sleep-wake cycle in humans.

PURPOSE:

The aim of our investigation was to ascertain whether ingestion of a tart cherry juice concentrate would increase the urinary melatonin levels in healthy adults and improve sleep quality.

METHODS:

In a randomised, double-blind, placebo-controlled, crossover design, 20 volunteers consumed either a placebo or tart cherry juice concentrate for 7 days. Measures of sleep quality recorded by actigraphy and subjective sleep questionnaires were completed. Sequential urine samples over 48 h were collected and urinary 6-sulfatoxymelatonin (major metabolite of melatonin) determined; cosinor analysis was used to determine melatonin circadian rhythm (mesor, acrophase and amplitude). In addition, total urinary melatonin content was determined over the sampled period. Trial differences were determined using a repeated measures ANOVA.

RESULTS:

Total melatonin content was significantly elevated (P < 0.05) in the cherry juice group, whilst no differences were shown between baseline and placebo trials. There were significant increases in time in bed, total sleep time and sleep efficiency total (P < 0.05) with cherry juice supplementation. Although there was no difference in timing of the melatonin circardian rhythm, there was a trend to a higher mesor and amplitude.

CONCLUSIONS:

These data suggest that consumption of a tart cherry juice concentrate provides an increase in exogenous melatonin that is beneficial in improving sleep duration and quality in healthy men and women and might be of benefit in managing disturbed sleep.

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