The use of Prunus species (which include cherries, plums, peaches, and almonds) to support the urinary system is primarily based on traditional herbal medicine practices rather than robust scientific validation. In various traditional systems, especially in Europe and Asia, different parts of Prunus plants—most notably the bark and fruit of Prunus domestica (European plum) and Prunus cerasus (sour cherry)—have been used as mild diuretics or for the relief of urinary discomfort. For example, in traditional European herbalism, preparations of plum bark or cherry stems have been used to promote urination and to manage mild urinary tract symptoms.

The evidence supporting these uses is largely anecdotal or based on folk remedies passed down through generations. There are limited scientific studies examining Prunus species specifically for urinary health. Some phytochemical analyses suggest the presence of compounds such as polyphenols and flavonoids, which may have mild diuretic effects, but these findings are preliminary and not widely corroborated by rigorous clinical trials.

In summary, while there is a tradition of using certain Prunus species to support urinary function, scientific validation is minimal, and the strength of evidence is weak. Most recommendations for Prunus in urinary health are rooted in historical use rather than modern research.