... grows in mountains, forests and damp bogs in north-east of America and Canada .Cranberries are distinguished by their extremely sour ... contain flavonoids, anthocyanins, ellagic acid, and vitamin C. Because of their tannin content, the berries possess a natural astringency.Recent ... relax and open blood vessels, the "anti-adhesion" mechanism of action found in cranberry PACs may also help prevent certain ...