Synopsis

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

Rhus glabra, commonly known as smooth sumac, has a history of traditional use by Native American tribes for oral health, particularly for supporting the gums and treating mouth sores. The berries and bark were often made into decoctions or infusions and used as mouth rinses to relieve sore gums, treat canker sores, and alleviate inflammation in the oral cavity. Ethnobotanical records document these applications, and sumac's astringent qualities—attributed to its tannin content—are believed to help tighten and tone tissues, which may contribute to gum health.

However, direct scientific validation for Rhus glabra specifically in the context of gum health is limited. While some general studies recognize the antimicrobial and astringent properties of sumac extracts, most research focuses on related species such as Rhus coriaria. The traditional rating of 2 reflects the presence of a historical use and plausible mechanism (astringency), but there is a lack of robust clinical trials or direct scientific evidence establishing efficacy or safety for gum health in modern contexts. Therefore, while Rhus glabra is traditionally used for supporting the gums, more research is needed to confirm its efficacy and inform its contemporary use.

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