Synopsis

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

Catechins, a class of polyphenolic compounds found abundantly in green tea, have been studied for their potential benefits in supporting gum (periodontal) health. Scientific evidence suggests that catechins exhibit antimicrobial, anti-inflammatory, and antioxidant properties, which are relevant to oral health. In vitro studies demonstrate that catechins, particularly epigallocatechin gallate (EGCG), can inhibit the growth of Porphyromonas gingivalis and other bacteria associated with periodontal disease. Clinical trials have shown that the use of catechin-containing mouthwashes or topical gels can reduce markers of gingival inflammation and plaque accumulation when used as an adjunct to conventional oral hygiene.

A 2016 review in the Journal of Investigative and Clinical Dentistry reported that green tea catechins reduced periodontal pocket depth and improved clinical attachment levels in patients with chronic periodontitis. Another randomized controlled trial published in Journal of Periodontology (2009) found that green tea-based mouthwash significantly reduced bleeding on probing and gingival inflammation compared to placebo. While these results are promising, the overall quality and quantity of clinical evidence are moderate, and most studies have short follow-up periods. Thus, catechins are considered to have a scientifically validated but not definitive role in supporting gum health, earning a mid-range evidence rating.

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