Featured Research

from universities, journals, and other organizations

Standardized testing method for cranberry products will reveal effectiveness of UTI treatments

Date:
April 21, 2010
Source:
Wiley-Blackwell
Summary:
Natural compounds in cranberries are linked to the prevention of urinary tract infections (UTIs) but inconsistencies in methods currently used commercially to measure levels can result in the over- or under-estimation of potency levels, leaving product manufacturers and consumers without good data.

Natural compounds in cranberries are linked to the prevention of urinary tract infections (UTIs) but inconsistencies in methods currently used commercially to measure levels can result in the over- or under-estimation of potency levels, leaving product manufacturers and consumers without good data. A study recently published in the Journal of the Science of Food and Agriculture outlines a new, commercially viable method of measuring these compounds.

Related Articles


UTIs are caused by bacterial adhesion (bacteria growth) on cells in the bladder. To maintain urinary tract health, especially for those prone to UTIs, daily consumption of 36mg of cranberry proanthocyanidins (PACs) has shown effectiveness in inhibiting bacteria from adhering to bladder cells, multiplying and consequently causing infection. This amount of PACs can be easily consumed in a 9-10 oz (266-296 ml) serving of 27% cranberry juice cocktail.

PACs are small molecules (catechin or epicatechin) linked together to form larger polymers. The PACs in cranberries contain a high proportion of what are called "A-type double linkages" between the catechin or epicatechin molecules. Other food sources of PACs that do not contain these linkages (chocolate, grapes, apples and green tea) do not elicit the bacterial anti-adhesion activity.

With some cranberry product testing methods, overestimation of up to five times the PAC level have been reported. This study uses the new BL-DMAC method of quantifying PAC levels in cranberry products which the authors claim can now serve as the standard industry method, allowing product manufacturers to provide accurate PAC levels.

To evaluate this method, 11 samples of cranberry products were obtained (five from U.S. sources and six from European sources) for PAC quantitation analysis. Powdered samples were coded and sent blinded to five different analytical laboratories (three in the U.S., one in China and one in Europe) for analysis by the BL-DMAC method. Each laboratory reported statistically consistent results of PAC levels.

"It is important to have an accurate, standard method for cranberry PAC quantitation that can be performed quickly and inexpensively in any commercial lab," said Ronald L. Prior, Ph.D, lead author of the study. "In our study, we have shown that the BL-DMAC method is validated for this use. It utilizes a commercially available standard, which is vital to obtaining accurate results among different laboratories."

"Universal adoption of this standard worldwide by the cranberry industry will allow producers to use one standard method to ensure accurate labelling of PAC levels in products, and aid consumers in selecting products with sufficient PAC levels to obtain bacterial anti-adhesion activity," added Prior.


Story Source:

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


Cite This Page:

Wiley-Blackwell. "Standardized testing method for cranberry products will reveal effectiveness of UTI treatments." ScienceDaily. ScienceDaily, 21 April 2010. <www.sciencedaily.com/releases/2010/04/100421075207.htm>.
Wiley-Blackwell. (2010, April 21). Standardized testing method for cranberry products will reveal effectiveness of UTI treatments. ScienceDaily. Retrieved December 20, 2014 from www.sciencedaily.com/releases/2010/04/100421075207.htm
Wiley-Blackwell. "Standardized testing method for cranberry products will reveal effectiveness of UTI treatments." ScienceDaily. www.sciencedaily.com/releases/2010/04/100421075207.htm (accessed December 20, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Saturday, December 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Researchers Test Colombian Village With High Alzheimer's Rates

Researchers Test Colombian Village With High Alzheimer's Rates

AFP (Dec. 19, 2014) In Yarumal, a village in N. Colombia, Alzheimer's has ravaged a disproportionately large number of families. A genetic "curse" that may pave the way for research on how to treat the disease that claims a new victim every four seconds. Duration: 02:42 Video provided by AFP
Powered by NewsLook.com
Monarch Butterflies Descend Upon Mexican Forest During Annual Migration

Monarch Butterflies Descend Upon Mexican Forest During Annual Migration

Reuters - Light News Video Online (Dec. 19, 2014) Millions of monarch butterflies begin to descend onto Mexico as part of their annual migration south. Rough Cut (no reporter narration) Video provided by Reuters
Powered by NewsLook.com
The Best Protein-Filled Foods to Energize You for the New Year

The Best Protein-Filled Foods to Energize You for the New Year

Buzz60 (Dec. 19, 2014) The new year is coming and nothing will energize you more for 2015 than protein-filled foods. Fitness and nutrition expert John Basedow (@JohnBasedow) gives his favorite high protein foods that will help you build muscle, lose fat and have endless energy. Video provided by Buzz60
Powered by NewsLook.com
Birds Might Be Better Meteorologists Than Us

Birds Might Be Better Meteorologists Than Us

Newsy (Dec. 19, 2014) A new study suggests a certain type of bird was able to sense a tornado outbreak that moved through the U.S. a day before it hit. Video provided by Newsy
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


Plants & Animals

Earth & Climate

Fossils & Ruins

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