Evidence supporting the use of: Tannin (unspecified)
For the body system: Gums

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Synopsis

Source of validity: Traditional
Rating (out of 5): 3

Tannins, a diverse group of polyphenolic compounds found in many plants, have a long history of traditional use in oral health, particularly for supporting the gums. In various cultures, plant extracts rich in tannins (such as from oak bark, witch hazel, or tea) have been applied as mouth rinses or poultices to soothe inflamed gums and reduce bleeding. The traditional rationale is based on tannins’ astringent properties—they cause tissues to contract, which can temporarily tighten mucosal surfaces and reduce minor bleeding and inflammation. There is some supportive scientific evidence: in vitro and small-scale clinical studies suggest tannins can inhibit the growth of oral pathogens and may reduce inflammation, though robust clinical trials are lacking. The astringent effect can offer symptomatic relief, and tannin-rich herbal preparations are still sometimes recommended by herbalists for mild gum complaints. However, tannins are not a mainstream dental treatment, and overuse may irritate oral tissues. Thus, while there is a strong basis in tradition, and some mechanistic plausibility, the overall scientific evidence remains limited, justifying a mid-level rating.

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