Cranberry juice contains  north-american cranberry dry extract,which natural urinary tract antiseptic properties have been proved in many trials Proanthocyanidins that are constituents in cranberry berry ,block bacteria, especially E. Coli adhesion to urinary tract epithelial cells. Also fructosis prevents specific bacteria binding to urinary epithel; if bacterias are not able to attach the bladdar walls, there will not be infection progression in that area.