Cranberries are well known for the health benefits they provide. The small, tart berries are rich in vitamin C and have high amounts of pectin, a polysaccharide that thickens when heated. They are a good source of dietary fiber and manganese, and contain vitamin E, copper and potassium. Cranberries have high levels of polyphenols and phytonutrients, which give the skin of the berries their intense red-color. These compounds provide antioxidant, anti-cancer and anti-inflammatory benefits. Research has shown that the proanthocyanidins present in Cranberries help prevent bacteria from adhering to the lining of the stomach and urinary tract.