Synopsis

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

Eucalyptus, particularly its essential oil and derived compound eucalyptol (1,8-cineole), has scientific support for use in the management of halitosis (bad breath). The primary mechanism involves antimicrobial activity against oral bacteria that produce volatile sulfur compounds (VSCs), which are a major cause of halitosis. Several clinical studies and in vitro experiments have demonstrated that eucalyptus oil or eucalyptol-containing mouthwashes can significantly reduce levels of VSCs and oral bacterial load.

For example, a randomized controlled trial published in the Journal of Periodontology (2008) found that chewing gum containing eucalyptus extract significantly reduced VSC levels and improved measures of oral malodor compared to placebo. Eucalyptol is also a key ingredient in some widely used therapeutic mouthwashes, such as Listerine®, where its efficacy in reducing plaque, gingivitis, and malodor has been documented.

While eucalyptus has a history of use in traditional medicine for respiratory and oral health, its role in treating halitosis is primarily supported by modern scientific evidence rather than tradition alone. However, the evidence is not as robust or extensive as for some other oral health interventions, and results can vary depending on formulation and concentration.

In summary, eucalyptus demonstrates moderate scientific validation (evidence rating: 3/5) for supporting or treating halitosis, largely due to its antibacterial effects and ability to reduce odor-causing compounds in the mouth.

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More about Halitosis

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