Blackberry (Rubus fruticosus) leaves are packed with condensed tannins, gallotannins, and flavonoids, while its dark berries contain high levels of anthocyanin antioxidants. In traditional medicine, blackberry leaf preparations serve as a potent astringent. The tannins bind rapidly to tissue proteins, forming a protective, drying barrier over irritated mucous membranes to quiet diarrhea, halt bleeding gums, and dry up weeping skin.
Educational information only — never stop or change a prescribed medication without talking to your prescriber first.
Due to its high tannin content, do not use dried leaf tea continuously for more than 2 weeks, as it can cause mild stomach irritation or constipate. Avoid if you have active kidney disease.
Evidence level: Moderate
Checking access...
