Synopsis

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

Lactobacillus gasseri is a probiotic bacterium that has been investigated for its potential role in oral health, including the management of gingivitis. Several scientific studies have explored the effects of probiotics, including L. gasseri, on periodontal health. The rationale is that probiotics may help rebalance the oral microbiome, suppress pathogenic bacteria, reduce inflammation, and enhance the host's immune responses in the gingival tissue.

A number of randomized controlled trials (RCTs) and clinical studies have included L. gasseri as a component of probiotic mixtures or as a single strain, showing some positive effects on reducing gingival inflammation, plaque accumulation, and bleeding on probing. For example, some clinical trials have demonstrated decreases in gingival index and improvements in other clinical markers of gingivitis after the use of probiotics containing L. gasseri over periods ranging from a few weeks to several months.

However, while these findings are promising, the overall body of evidence is still moderate. Many studies use mixed probiotic preparations rather than L. gasseri alone, making it difficult to isolate its specific effects. Furthermore, sample sizes are often small, and the duration of studies relatively short. Systematic reviews suggest a potential adjunctive benefit of probiotics in gingivitis management, but call for larger, longer-term studies to confirm efficacy and determine optimal administration methods.

In summary, there is scientific support for the use of L. gasseri in gingivitis, but the strength of the evidence is moderate, and further research is needed to establish definitive recommendations.

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