Synopsis

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

Thymol, a natural monoterpene phenol derived from thyme oil, has a long history of traditional use as an antiseptic and in oral care. Its application for canker sores (aphthous ulcers) is primarily based on its antimicrobial and anti-inflammatory properties, which have been recognized in folk medicine and incorporated into commercial mouthwashes and oral hygiene products. While thymol is effective against a range of bacteria and fungi in vitro and is known to reduce oral microbial load, there is limited direct scientific research specifically evaluating its efficacy in treating canker sores. Most support comes from its general benefits in oral health, such as reducing plaque and gingivitis, and from anecdotal or traditional reports suggesting it may soothe mouth sores and prevent secondary infection. Well-controlled clinical trials directly assessing thymol for aphthous ulcers are lacking, so while its use is common in traditional and over-the-counter oral preparations, the evidence base specific to canker sores is weak. Thus, thymol's use for this indication is best classified as "traditional," supported by biological plausibility and historical use rather than robust clinical evidence.

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Other ingredients used for Canker Sores

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