Purple Grape Juice
Provides Option for Urinary Infections



In laboratory tests, compounds found in purple grape juice were as effective as those found in cranberry juice in blocking the bacterial adhesion that is thought to contribute to urinary tract infections. Urinary tract infections are a painful condition that affects nearly ten million Americans each year, mostly women, and are the country’s second most commonly treated infection.

“It is well accepted that drinking cranberry juice reduces the incidence of urinary tract infection in women,” explains David Mark, Ph.D., R&D Manager, Health and Nutrition, for Welch Foods Inc., which sponsored the study.  “This effect is attributed to compounds in the juice called proanthocyanidins. In our in vitro study, the proanthocyanidins from purple grape juice showed similar anti-adhesive qualities as those from cranberry juice.”

Urinary tract infections occur when E. coli, a common bacterium, adheres to the lining of the bladder, colonizes and infects the bladder and urinary tract.   The study, conducted five separate times,  compared proanthocyanidins from Welch’s Purple 100% Grape Juice against those from both Ocean Spray Cranberry Juice Cocktail and 100% cranberry juice in their effect against E. coli and found that the grape juice proanthocyanidins provided comparable bacterial anti-adhesion.

 “We think this is good news for the consumer,” adds Mark.  “More and more Americans are drinking purple grape juice for their heart health. Now people concerned about urinary tract health may have another effective, good tasting option to consider.”

Purple grape juice has been shown to enhance cardiovascular function in a number of previous preliminary clinical studies.  One serving of Welch’s Purple 100% grape juice contains 100% of the RDA of vitamin C and counts towards the USDA goal of five servings of fruits and vegetables a day.  According to a USDA study, purple grape juice also has three times the antioxidant power of such popular juices as grapefruit, orange, tomato and apple.  It also carries the American Heart Association’s HeartCheck symbol.  

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