Evidence supporting the use of: Gallotannin (unspecified)
For the health condition: Bleeding (external)

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Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Gallotannin, a type of hydrolyzable tannin found in various plants (notably oak galls), has a long history of traditional use as an astringent agent to manage external bleeding. Historically, tannin-rich plant extracts have been applied topically to wounds to help stop bleeding, primarily due to their ability to precipitate proteins and constrict tissues, thereby reducing capillary permeability and promoting hemostasis. Ancient medical systems and traditional herbal practices in regions such as Europe, Asia, and the Middle East have utilized preparations containing gallotannins for minor cuts, abrasions, and other superficial bleeding conditions.

Despite its prevalent use in traditional medicine, modern scientific validation supporting the efficacy of gallotannin specifically for external bleeding is limited. The general astringent properties of tannins provide a plausible mechanism for hemostatic action, but direct clinical trials or robust scientific studies focused on gallotannin are lacking. Most of the available evidence is extrapolated from its known biochemical effects and historical use rather than from rigorous research. Overall, while the practice has deep traditional roots and a logical basis, its use is not strongly supported by contemporary scientific evidence.

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