D-Mannose is commonly available in supplement and health food stores as well from online supplement providers. This supplement is sold on Amazon.com, where it is available in both capsule and powder form.
D-mannose is a sugar monomer that is related to glucose. It is naturally found in some fruits. Mannose is considered to be an alternative method to prevent urinary tract infections. According to WebMD, however, there is insufficient evidence to back up this claim. Mannose is also used as a treatment for a rare metabolic disorder called carbohydrate-deficient glycoprotein syndrome type 1b. For healthy adults, mannose is safe to consume.