Cranberry juice is known to have various health benefits. These include:
Cranberry juice may help prevent and relieve the symptoms of urinary tract infections by primary and secondary means. The primary means works on the bacteria directly by altering the molecular structure of the fimbriae on the virulent strains of the bacteria that cause the infections. The secondary means works indirectly on the bacteria by changing the intravesical pH (the pH of the bladder's contents) making it more acidic.
Cranberry juice is high in oxalate, and has been suggested to increase the risk for developing kidney stones, although more recent studies have indicated it may lower the risk.