Research
Cleavers for Bladder Health: Evidence, Interactions and Cautions
Cleavers 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: Galium aparine; clivers; goosegrass; sticky willy; catchweed bedstraw
What the evidence says about Cleavers
A review of the genus Galium in the Journal of Applied Pharmaceutical Science describes only in vitro, cell-culture and animal work for Galium aparine and records no human clinical trials of any kind. Its British Herbal Pharmacopoeia entry is a traditional-use listing, historically for skin complaints rather than the bladder. It does not appear among the EMA's herbal monographs, so no regulator has assessed even its traditional urinary use.
The grade "none" means: none — No human trial evidence we could find for this use. Grades are explained in full on our methodology page.
Read the primary source this grade rests on (opens in a new tab).
Cleavers 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 Cleavers
No specific cautions recorded beyond the usual ones for any supplement: check with your doctor if you are pregnant, breastfeeding, have liver or kidney disease, or take regular medication.
Read more on HerWellReport
This entry is generated from row "Cleavers" 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.