Doctors explain what d-mannose is, how it works, and whether it can help prevent recurrent UTIs. Plus, they share other science-backed ways to prevent UTIs.

D-mannose is a type of sugar that researchers believe may help treat urinary tract infections (UTIs). Learn more about the studies, conclusions, and possible dosage here.

This suggests D-mannose may have some use for people with dysbiosis, an imbalance in good and bad bacteria. D-mannose supplements are taken by mouth. Can you get D-mannose naturally from foods?

Chronic UTIs that recur even with antibiotics may be prevented with D-mannose or proanthocyanidins , a supplement from cranberries, a doctor says.