Water Lily, referring broadly to species in the Nymphaeaceae family (such as Nymphaea alba or Nymphaea odorata), has a traditional history of use in supporting urinary and bladder health, primarily in European, Native American, and some Asian herbal practices. Historical records and ethnobotanical literature note that water lily rhizomes and other parts were used as diuretics and astringents, and were sometimes prepared in infusions or decoctions aimed at soothing irritation in the urinary tract or addressing mild bladder complaints. For example, the white water lily (Nymphaea alba) was included in the British Pharmacopoeia of the 19th century as an astringent for genitourinary issues. Some indigenous North American groups used the related Nymphaea odorata for similar purposes.

However, there is little to no contemporary scientific research validating these traditional uses. No clinical trials or robust pharmacological studies specifically support water lily’s efficacy for bladder health. Its use persists in traditional herbalism, but without modern evidence, its utility should be regarded as based on historical precedent rather than scientific proof.