Daily listerine use may increase bacteria linked to cancer, suggests Study

A recent study published in the Journal of Medical Microbiology has revealed that regular use of alcohol-based mouthwashes may have detrimental effects on the oral microbiome, potentially increasing the risk of periodontal diseases and certain cancers. The oral microbiome plays a crucial role in digestion and maintaining overall oral health.

The research, conducted by the Institute of Tropical Medicine (ITM) in Belgium, observed that daily use of alcohol-based mouthwash over three months led to a significant increase in two species of opportunistic bacteria: Fusobacterium nucleatum and Streptococcus anginosus. These bacteria are linked to a higher risk of gum disease, as well as esophageal and colorectal cancers.

Additionally, the study noted a decrease in Actinobacteria, a group of bacteria essential for regulating blood pressure. This finding underscores the delicate balance of the oral microbiome and the potential consequences of disrupting it through regular use of alcohol-based mouthwashes.

Reference: J.G.E. Laumen​, C. Van Dijck, S.S. Manoharan-Basil​, T. de Block​, S. Abdellati​, B.B. Xavier​, S. Malhotra-Kumar​ and C. Kenyon; The effect of daily usage of Listerine Cool Mint mouthwash on the oropharyngeal microbiome: a substudy of the PReGo trial; Journal of Medical Microbiology; https://doi.org/10.1099/jmm.0.001830