Evidence supporting the use of: Black walnut
For the health condition: Bites and Stings

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Synopsis

Source of validity: Traditional
Rating (out of 5): 1

Black walnut (Juglans nigra) has a long history of use in traditional herbal medicine, particularly among Native American tribes and early European settlers in North America. Historically, black walnut hulls and leaves were applied topically as poultices or washes for various skin conditions, including insect bites, stings, and minor wounds. This use was typically based on the plant’s astringent and purported antimicrobial properties. The hulls contain compounds such as juglone, tannins, and flavonoids, which may have contributed to the perceived effectiveness by creating an unfavorable environment for microbes and reducing local inflammation or irritation. However, while these traditional uses are well documented in ethnobotanical records, there is minimal scientific research directly examining black walnut’s efficacy for bites and stings. Some laboratory studies have demonstrated antimicrobial and antifungal effects of juglone and other constituents, but these do not specifically address inflammatory or allergic reactions from bites or stings. There are no well-designed clinical trials to support its use for this particular indication. As such, modern herbalists may mention black walnut in the context of traditional remedies, but its use for bites and stings is not supported by robust scientific evidence. Caution is also warranted due to the potential for skin irritation or allergic reactions to the hulls.

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