Synopsis

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

Ceanothus integerrimus, commonly known as deerbrush, has a history of use among Native American tribes in North America for various medicinal purposes, including as a treatment for infections and as a general antimicrobial wash. Ethnobotanical records indicate that the roots and leaves were used to create decoctions or poultices applied to wounds or used as washes for skin infections. The Maidu, for instance, used a root preparation for skin sores, while the Karuk reportedly used the plant for sore throats and as a blood purifier. The rationale was based on observed antibacterial effects in traditional settings, but these claims have not been thoroughly investigated in modern scientific studies.

Currently, there is a lack of robust scientific evidence—such as in vitro, animal, or clinical studies—specifically validating the antibacterial properties of Ceanothus integerrimus. Some members of the Ceanothus genus have shown mild antimicrobial activity in laboratory studies, but these findings are preliminary and not specific to this species. Thus, while the traditional use for bacterial infections is well-documented, scientific support remains weak, and efficacy has not been conclusively demonstrated.

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