Blackthorn (Prunus spinosa), which produces sloe berries, is rich in condensed tannins, organic acids, vitamin C, and flavonoids. In traditional European medicine, sloe berry extracts act as an excellent mild astringent and digestive tonic. The tannins bind to mucosal proteins to form a protective, drying layer that quietens loose stools and throat irritation, while its rich flavonoids support capillary strength and vitality.
Educational information only — never stop or change a prescribed medication without talking to your prescriber first.
Generally exceptionally safe. Do not chew or crack open sloe berry seeds in large quantities, as they contain cyanogenic glycosides (amygdalin). Avoid therapeutic doses during pregnancy.
Evidence level: Moderate
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