Featured Research

from universities, journals, and other organizations

Cranberry juice now unlikely to prevent cystitis, review finds

Date:
October 16, 2012
Source:
Wiley
Summary:
Cranberry juice is unlikely to prevent bladder and kidney infections, according to an updated systematic review published in the Cochrane Library. The authors analysed the most up-to-date evidence and concluded that any benefit, if present at all, is likely to be small and only for women with recurrent UTI.

Cranberry juice is unlikely to prevent bladder and kidney infections, according to an updated systematic review published in The Cochrane Library. The authors analysed the most up-to-date evidence and concluded that any benefit, if present at all, is likely to be small and only for women with recurrent UTI.

Related Articles


Urinary tract infections (UTIs) affect the bladder, as in cystitis, and sometimes the kidneys. Cranberries and cranberry juice have been used to prevent UTIs for decades, although it is not clear how they might help protect against infection. According to one theory, certain sugars and flavanol compounds in cranberries prevent bacteria sticking to cells lining the walls of the urinary tract. Several systematic reviews have been published on the subject in The Cochrane Library, each time incorporating more evidence. In the last review in 2008, it was concluded that cranberries offer a small benefit in preventing recurring UTIs in women.

In the current review, the researchers gathered together evidence from 24 studies that involved a total of 4,473 people. These studies included 14 added since the 2008 update. Those in treatment groups were given cranberry juice, tablets or capsules, while those in control groups were given placebo cranberry products, water, methenamine hippurate, antibiotics, lactobacillus or nothing. Although in some studies there were small benefits for women suffering from recurring infections, women would have to consume two glasses of cranberry juice per day for long periods to prevent one infection. The researchers conclude that current evidence does not support cranberry juice as a means of preventing UTIs.

"Now that we've updated our review with more studies, the results suggest that cranberry juice is even less effective at preventing UTIs than was shown in the last update," said lead researcher Ruth Jepson of the University of Stirling in Stirling, UK. In the studies where participants were given juice, there were large numbers of drop-outs, suggesting it might not be acceptable to drink over long time periods. A common problem with the studies evaluating cranberry tablets or capsules was that they rarely reported the amount of active ingredient, so it was unclear whether levels would have been high enough to have any effect.

"We can't see a particular need for more studies of the effect of cranberry juice, as the majority of existing studies indicate that the benefit is small at best, and the studies have high drop-out rates," said Jepson. "More studies of other cranberry products such as tablets and capsules may be justified, but only for women with recurrent UTIs, and only if these products contain the recommended amount of active ingredient."

Funding for the 2012 update of the review was provided by the UK NHS NIHR.


Story Source:

The above story is based on materials provided by Wiley. Note: Materials may be edited for content and length.


Cite This Page:

Wiley. "Cranberry juice now unlikely to prevent cystitis, review finds." ScienceDaily. ScienceDaily, 16 October 2012. <www.sciencedaily.com/releases/2012/10/121016204143.htm>.
Wiley. (2012, October 16). Cranberry juice now unlikely to prevent cystitis, review finds. ScienceDaily. Retrieved February 1, 2015 from www.sciencedaily.com/releases/2012/10/121016204143.htm
Wiley. "Cranberry juice now unlikely to prevent cystitis, review finds." ScienceDaily. www.sciencedaily.com/releases/2012/10/121016204143.htm (accessed February 1, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Sunday, February 1, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Hikers Rescued After Fall from Oregon Mountain

Hikers Rescued After Fall from Oregon Mountain

AP (Feb. 1, 2015) Two climbers who were hurt in a fall on Mount Hood are now being treated for their injuries. Rescue officials say they were airlifted off the mountain Saturday afternoon by an Oregon National Guard helicopter. (Feb. 2) Video provided by AP
Powered by NewsLook.com
Smart Glasses Augment Reality to Help Visually Impaired

Smart Glasses Augment Reality to Help Visually Impaired

Reuters - Innovations Video Online (Feb. 1, 2015) New augmented reality smart glasses developed by researchers at Oxford University can help people with visual impairments improve their vision by providing depth-based feedback, allowing users to "see" better. Joel Flynn reports. Video provided by Reuters
Powered by NewsLook.com
Flu Season Hitting Elderly Hard

Flu Season Hitting Elderly Hard

Reuters - US Online Video (Jan. 31, 2015) The CDC says this year&apos;s flu season is hitting people 65 years of age and older especially hard. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
CDC: Get Vaccinated for Measles

CDC: Get Vaccinated for Measles

Reuters - US Online Video (Jan. 30, 2015) The CDC is urging people to get vaccinated for measles amid an outbreak that began at Disneyland and has now infected more than 90 people. Linda So reports. Video provided by Reuters
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:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

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