Cranberry Extract is the natural secret to having a healthy urinary tract and bladder. Cranberries contain unique bioactive proanthocyanidins and other antioxidants, accounting for their red color. The powerful antioxidant (proanthocyanidins) in cranberries coat and protect the urinary tract so that bacteria does not adhere to the bladder epithelium cells. Cranberry is the most commonly used method for prevention and treatment of bladder infection or urinary tract infections (UTIs) in the United States. Natrol Cranberry relies on the clinically proven benefits of cranberry to help support a healthy bladder and urinary tract. Each easy-to-swallow serving of Natrol(r) Cranberry capsule includes 800 mg of cranberry extract.