Cranberries contain antibacterial compounds that act against the coliform bacteria that cause urinary tract infections. The primary mechanism of action may be the decrease in the adhesion of bacteria (most notably E. coli) to urinary tract cells. It is an exceptional natural remedy for the prevention of urinary tract infections (UTIs). UTIs are caused by bacteria, in particular, Escherichia coli, which stick to cells that line the bladder. Cranberry extract prevents the E. coli from adhering to the bladder lining.