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

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Synopsis

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

Gallotannin, a type of hydrolyzable tannin found in various plants such as oak galls, has a long history of traditional use to manage internal bleeding and diarrhea. In traditional herbal medicine, especially within some systems such as Traditional Chinese Medicine and European herbalism, gallotannin-containing preparations have been used for their astringent properties. These astringent effects are believed to help "tighten" mucosal tissues and reduce bleeding by promoting vasoconstriction and protein precipitation at the site of injury. There is, however, a lack of robust clinical studies or modern scientific validation for the use of gallotannins specifically for internal bleeding. Most evidence is anecdotal or based on historical texts, without controlled trials to confirm efficacy or safety. Some in vitro studies suggest that tannins may have hemostatic effects, but these findings have not been translated into clear clinical recommendations. Therefore, while the use of gallotannin for internal bleeding is rooted in tradition, the quality and quantity of scientific evidence to support its efficacy are limited.

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