Cranberry juice has long been recognized for its role in supporting urinary tract health. Its beneficial properties were originally attributed to its ability to acidify urine. However, recent research indicates that the active components of cranberry prevent deleterious bacteria (such as Escherichia coli) from adhering to the epithelial lining of the urinary tract where they could otherwise congregate, multiply, and induce infection. The identity of the active ingredients of cranberry has not yet been completely described. It appears that two components of cranberry inhibit bacterial adhesion: fructose, a sugar typically found in fruit, and a yet to be identified polymeric compound. Whole cranberries also contain proanthocyanins and anthocyanins, two bioflavonoids known for their antioxidant activity. Other health benefits have been ascribed to the presence of several organic acids including hippuric, ellagic, shikimic, quinic, malic, benzoic, and citric acids. Cran-Max is the only cranberry dietary supplement shown to contain ellagic acid which is reported to be the principle organic acid in natural cranberry fruit.