Synopsis

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

Corn silk (Stigma maydis) has been traditionally used in various cultures, particularly in traditional Chinese medicine, Native American healing, and folk medicine, as a natural remedy to support healthy urination and address urinary complaints. It is commonly used as a mild diuretic, intended to promote urine flow and reduce water retention. Historical records document its use for conditions such as frequent urination, cystitis, and other urinary tract disturbances.

The presumed mechanism of action is related to its content of bioactive compounds such as flavonoids, saponins, and potassium, which may have mild diuretic effects. However, scientific validation of these effects is limited. A handful of small clinical and preclinical studies suggest that corn silk extracts may increase urine output and exhibit anti-inflammatory and antioxidant effects in renal tissues, but these studies are generally of low quality or limited in scope. There is insufficient high-quality evidence to support its use specifically for frequent urination, especially in the context of overactive bladder or nocturia.

Despite the lack of robust clinical trials, corn silk remains a popular herbal remedy for urinary issues in traditional medicine. Safety data are limited but it is generally considered to have a low risk profile when used in moderation. In summary, the use of corn silk for supporting urination is primarily based on traditional use, with only weak supporting evidence from modern scientific studies.

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