<prompt> Fruit juice which helps in preventing UTICranberryRaspberryOrangeGrape  <response>: Cranberry juice contains proanthocyanidins that block adherence of pathogens to uroepithelial cells in vitro . Randomized trials in low-risk patients show that 200 to 750 mL daily of cranberry or lingonberry juice or cranberryconcentrate tablets reduce the risk of symptomatic, recurrent infection by 12 to 20 . However, the actual cranberry content of juices and tablets varies substantially; therefore their efficacy is not predictable . Fuhermore, other trials of cranberry products show no benefit and there is no evidence that they are effective for treatment of UTIs . However the best option here is cranberry juice . ref : Campbell - Walsh urology 11th ed , chapter 12 , pg no : - 274 