Supports a Healthy Urinary Tract! Cranberries are a well-known source of abundant flavonoids and other bioactive components. There are several distinct classes of flavonoids found in cranberries, all with free radical neutralizing properties and each having potentially unique physiologic functions. Cranberry flavonoids include anthocyanins, the pigments that give cranberries their rich red color, as well as flavonols and proanthocyanidins. D-Mannose is a simple sugar that occurs naturally in some plants. Although small amounts of D-Mannose are metabolized by the human body, most of it is rapidly excreted in the urine. Similar to proanthocyanins, it exerts an anti-adhesion effect in the urinary tract that allows waste products to be flushed out in the urine.