Synopsis

Source of validity: Traditional
Rating (out of 5): 3

Berries, particularly cranberry (Vaccinium macrocarpon), have a longstanding tradition of use in supporting bladder health, especially in the context of preventing urinary tract infections (UTIs). Historically, Native American populations used cranberries for urinary and bladder ailments. The rationale for their traditional use stems from the observation that cranberry consumption appears to reduce the frequency of UTIs, which involve the bladder and lower urinary tract. Scientific research has provided moderate support for this traditional use, with studies indicating that certain compounds in cranberries, such as proanthocyanidins, may help prevent the adhesion of Escherichia coli bacteria to the bladder wall, thereby reducing the risk of infection. However, the strength and consistency of clinical evidence are variable, with some meta-analyses showing modest benefit while others report limited or no effect. Other berries, such as bearberry (Arctostaphylos uva-ursi), are also used traditionally for bladder and urinary health, but scientific evidence supporting their efficacy is even less robust. In summary, the use of "berry" to support the bladder is justified primarily by tradition, with some scientific evidence (especially for cranberry) suggesting a potential benefit, though the overall evidence quality is moderate.

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