Natures Plus Ultra Cranberry 1000 is an American cranberry concentrate in the form of sustained-release tablets for optimal absorption. The American cranberry is recognized for its benefits on the urinary system. Powdered cranberry juice concentrate is an adjunct in the treatment and prevention of urinary tract infections. The most prominent active ingredients are proanthocyanidins and organic acids. Cranberry proanthocyanidins (PACs) are flavonoids that inhibit bacterial adherence (especially P-fimbriated Escherichia coli) to the urothelial cells of the urinary tract walls. Quinic acid, an important organic acid found in bilberry, is metabolized to hippuric acid, which acidifies urine and controls bacterial growth. With vitamin C that helps acidify urine, creating a hostile environment for bacteria and supporting the immune system. It is recommended to take 2 tablets a day. Food supplements should not be used as a substitute for a balanced and varied diet and a healthy lifestyle. Do not exceed the recommended daily dose. Keep out of reach of young children. People on anticoagulant therapy such as warfarin should consult their doctor before taking this supplement. Store in a cool, dry place.