Synopsis

Source of validity: Traditional
Rating (out of 5): 3

Shepherd's purse (Capsella bursa-pastoris) has a long history of traditional use for treating and supporting control of external bleeding. Traditionally, its aerial parts have been applied as poultices or used in washes to help stop bleeding from wounds, cuts, and abrasions. This use is well documented in European folk medicine and in traditional Chinese medicine, where shepherd's purse is described as having hemostatic properties. The plant contains several bioactive compounds, including flavonoids, tannins, and alkaloids, which are thought to contribute to its astringent and vasoconstrictive effects—mechanisms that could theoretically help reduce bleeding by constricting blood vessels and promoting coagulation.

Despite this traditional use and plausible mechanism, rigorous scientific validation is limited. Some in vitro and animal studies suggest that extracts of shepherd's purse can promote vasoconstriction and clotting, but high-quality clinical trials in humans are lacking. Consequently, while there is significant traditional support and some preliminary scientific rationale, strong modern clinical evidence is absent. The evidence rating of 3 reflects a moderate level of support based on traditional use and some preclinical data, but not robust human studies. Nevertheless, shepherd's purse continues to be used in various natural and herbal topical preparations for minor external bleeding. Anyone considering its use should be aware of the lack of comprehensive clinical validation and consult healthcare professionals for significant wounds or bleeding disorders.

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