Research
Corn silk for Bladder Health: Evidence, Interactions and Cautions
Corn silk is an ingredient used in bladder supplements marketed to women. Below is what it has actually been studied for, how strong that evidence is, the drug interactions and cautions on record, and the primary source our grade rests on — all drawn from the HerWellReport ingredient dataset.
Also sold as: Zea mays stigma; Maydis stigma; corn stigmata; stigma maydis
What the evidence says about Corn silk
The EMA assessment states plainly that there are no well-designed clinical trials on the diuretic activity of corn silk water extracts. The human data it could find were a 58-volunteer pilot study of blood pressure, one case report of a child with bedwetting, and a 2019 review of five hypertension trials in 567 patients showing only limited benefit alongside blood-pressure drugs. The diuretic claim rests on rat studies and long-standing use, not on trials in people with urinary symptoms.
The grade "very limited" means: very limited — Mostly animal, laboratory or anecdotal evidence, with at most a single weak human study. Grades are explained in full on our methodology page.
Read the primary source this grade rests on (opens in a new tab).
Corn silk drug interactions
No documented drug interactions in the sources we checked. That is not the same as proof of safety alongside your medication — it usually means the question has not been studied. Ask a pharmacist before combining it with prescription drugs.
Who should be careful with Corn silk
- Not in pregnancy or breastfeeding
- Not under 12 years
- Keep fluid intake up while taking it
Read more on HerWellReport
- Best Bladder Control Supplements for Women (2026): What’s Actually in Them
- Nature’s Way AM/PM PeriMenopause Formula: An Honest Ingredient Review
This entry is generated from row "Corn silk" of the HerWellReport ingredient dataset (v2.1, updated 2026-09-23). The dataset is free to reuse under CC BY 4.0 — how to cite it. Ingredient evidence is not evidence for any finished product, and nothing here is medical advice.