Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Uva Ursi (Arctostaphylos uva-ursi), also known as bearberry, has a long history of traditional use, especially in Europe and North America, for supporting urinary tract and kidney health. The leaves contain compounds such as arbutin, which is metabolized to hydroquinone—a substance that has mild antimicrobial properties. Historically, herbalists have used Uva Ursi as a diuretic and urinary antiseptic, recommending it for urinary tract discomfort, bladder inflammation, and mild kidney support. Most of the tradition-based applications target the urinary system, with the intent to help flush out bacteria and reduce irritation in the urinary tract, which includes the kidneys. However, scientific validation for Uva Ursi’s effectiveness specifically in supporting kidney health remains limited. Some laboratory and animal studies demonstrate antimicrobial activity of arbutin or hydroquinone against certain urinary pathogens, but robust clinical trials in humans are lacking. Furthermore, most clinical research focuses on urinary tract infections rather than direct kidney function or health. The safety profile is also a concern, as hydroquinone can be toxic at higher doses or with long-term use. In summary, Uva Ursi’s use for kidney support is primarily rooted in traditional herbal medicine, with some scientific rationale for its urinary antiseptic effects, but with limited direct evidence for kidney health specifically.

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