How exactly does cranberry juice help with uti's?

Various: Many recent studies have proven that real cranberry juice helps prevent UTI in women. Mainly, the components of cranberry juice prevent bacterial colonization of the lining of the lower gu tract (bladder and urethra). It also helps to slightly acidify the urine to keep bacteria at bay. Proper amount if water intake also helps, along with not holding in your urine for prolonged periods of time.

Prevention: Cranberry juice can help to prevent urinary tract infections (UTI's) in women with recurrent UTI's because of the proanthyocyanidins (PACs) it contains.