Myth: Drinking cranberry juice prevents urinary tract infections (UTIs)

Fact: Proanthocyanidins are thought to be the active ingredient in cranberries that helps prevent UTI-causing bacteria from adhering to the cells that line the urinary tract. A 2012 systematic review of 24 studies concluded that cranberry's preventative role is less effective than previously found in a 2008 review, although some small studies demonstrated a limited benefit for women with recurrent UTIs.  

Current research does not clarify whether drinking cranberry juice or taking a cranberry extract supplement is more beneficial or what the most effective dose of either alternative is. If you're considering trying cranberry juice to prevent a UTI, it is best to use 100% pure cranberry juice, which is costly, can be hard to find and may taste unpalatable to some people. Cranberry juice cocktail contains more water and sugar and is typically a blend of other less expensive juices so it has a much smaller amount of proanthocyanidins. If you are considering taking a cranberry extract supplement, check the label for a Natural Product Number (NPN) or a Drug Identification Number (DIN). This means the product is regulated and approved for sale in Canada. Cranberry juice and cranberry extract capsules interact with some medications so check with a pharmacist or your physician before taking either for UTI prevention.

Cranberry products are not effective for treating existing urinary tract infections. If you think you have a UTI, contact your healthcare provider for assessment and treatment.