Medically reviewed by Lindsay Cook, PharmD D-mannose is a simple sugar that may have benefits for urinary tract health. It ...

One systematic review of seven studies could not determine if taking D-mannose long-term compared with no treatment, other supplements, or antibiotics reduced the number of repeated UTIs.

In the Journal of Dietary Supplements study, participants took either Ellura or D-mannose over 1-week periods and collected their urines at various time points.