Uva-Ursi leaf extract comes from the leaves of the bearberry plant. The body converts its main compound, arbutin, into hydroquinone. This metabolite has a long history of traditional use for urinary tract support.
People typically take it for short periods, usually 5 to 7 days, to address urinary discomfort. An acidic urine environment makes its metabolites more active, so some users pair it with vitamin C or cranberry.
Do not take Uva-Ursi long-term or in repeated cycles. Extended use can damage the liver and kidneys. Pregnant or breastfeeding women, children, and anyone with a kidney disorder should avoid it entirely.