Mannose, packaged as the nutritional supplement "d-mannose", is a sugar monomer of the aldohexose series of carbohydrates. Mannose is a C-2 epimer of glucose. Mannose is important in human metabolism, especially in the glycosylation of certain proteins.
D-mannose is a kind of sugar that is related to glucose. D-mannose is used for preventing urinary tract infections (UTIs) and treating carbohydrate-deficient glycoprotein syndrome, an inherited metabolic disorder.