Evidence supporting the use of: Tannin
For the body system: Gums

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Table of Contents

Synopsis

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

Tannins have a long history of use in traditional medicine for supporting oral health, including the gums. Traditionally, tannin-rich plant extracts—such as those from oak bark, witch hazel, and certain teas—have been used as astringents in mouthwashes or poultices to help tighten gum tissue, reduce minor bleeding, and soothe inflammation. The astringent action of tannins is believed to precipitate proteins on the surface of mucous membranes, thereby forming a protective layer and reducing irritation or swelling. Historically, such herbal remedies were recommended for conditions like gingivitis and mouth ulcers. However, while these uses are rooted in tradition and some small studies suggest possible antibacterial and anti-inflammatory effects of tannins in the oral cavity, robust scientific validation is limited. Most modern clinical studies focus on tannins’ antibacterial properties in vitro rather than direct clinical outcomes for gum health. There is some preliminary evidence that tannins can inhibit the growth of certain oral pathogens associated with gum disease, but well-controlled human trials are lacking. Therefore, while tannins are traditionally used to support gum health, and there is plausible mechanistic support, the overall level of scientific evidence remains modest.

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