d-Mannose is a simple sugar found naturally in fruits such as cranberries and pineapples. It is absorbed slowly from the gastrointestinal tract and unlike many sugars, it is not converted into glycogen or stored in the liver. Much of the d-Mannose consumed is filtered by the kidneys and delivered to the bladder, where it is excreted in the urine. Daily supplementation with d-Mannose is a great alternative to drinking cranberry juice as cranberry juice frequently contains high levels of fructose and is not often standardized to d-Mannose concentrations.
