Chinese Sumac (Rhus chinensis), also known as Galla Chinensis, has a long history of use in traditional Chinese medicine (TCM) for various ailments, including oral health problems such as gingivitis. Historical records and materia medica texts document its use for "clearing heat," "detoxifying," and treating mouth sores and gum inflammation. The primary active constituents are gallotannins, which are known for their astringent and antimicrobial properties, and these are believed to help reduce gum swelling and bleeding.

While several in vitro studies have demonstrated that extracts from Galla Chinensis possess antibacterial effects against oral pathogens like Streptococcus mutans and Porphyromonas gingivalis (key contributors to gingivitis and periodontitis), robust clinical evidence in humans remains limited. Existing animal and laboratory research suggests potential efficacy, but high-quality randomized controlled trials in humans are lacking. As a result, the use of Chinese Sumac for gingivitis is primarily justified by traditional knowledge, supported by some preliminary scientific findings, but the overall evidence is not strong.

In summary, the use of Chinese Sumac for gingivitis is rooted in traditional practice, with limited but suggestive scientific support. More rigorous clinical research is needed to validate its effectiveness for this indication.