Evidence supporting the use of: Lactobacillus reuteri
For the health condition: Halitosis

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Synopsis

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

Lactobacillus reuteri has been studied for its potential to reduce halitosis (bad breath), and there is a moderate level of scientific evidence supporting its use for this purpose. Halitosis is primarily caused by volatile sulfur compounds (VSCs) produced by anaerobic bacteria in the mouth. Several clinical studies have examined the efficacy of L. reuteri probiotics in reducing oral VSCs and improving breath odor. For example, randomized controlled trials (RCTs) have demonstrated that oral administration of L. reuteri, either as chewing gum, lozenges, or tablets, can significantly decrease VSC levels and improve subjective assessments of breath odor compared to placebo. The mechanism of action is thought to involve L. reuteri's ability to colonize the oral cavity, inhibit the growth of odor-producing bacteria such as Porphyromonas gingivalis and Fusobacterium nucleatum, and modulate the oral microbiota towards a less malodorous profile. While these findings are promising, the body of evidence is still limited by small sample sizes and short study durations. Thus, while L. reuteri is not part of traditional remedies for halitosis, there is a growing base of clinical evidence supporting its use as an adjunctive therapy for managing bad breath, justifying a moderate (3/5) rating for scientific support.

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