Evidence supporting the use of: Lactobacillus mixed)
For the health condition: Halitosis

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Synopsis

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

Lactobacillus (mixed species) has some scientific evidence supporting its use in the management of halitosis (bad breath). Halitosis is often caused by volatile sulfur compounds (VSCs) produced by anaerobic bacteria in the oral cavity. Probiotics, including various Lactobacillus species, are thought to help restore a healthy balance of oral microbiota, thereby reducing the growth of odor-causing bacteria. Several clinical studies have investigated the effects of probiotic supplementation on oral health and halitosis. For example, randomized controlled trials have shown that the use of probiotic lozenges or tablets containing Lactobacillus salivarius, Lactobacillus reuteri, and other species can lead to reductions in VSC levels and subjective improvements in breath odor. A 2016 meta-analysis concluded that probiotics, including Lactobacillus strains, could significantly reduce halitosis scores compared to placebo, though the quality of evidence was moderate and the duration of studies was generally short (often 2-12 weeks). The proposed mechanisms include competitive inhibition of odor-causing bacteria, production of antimicrobial substances, and enhancement of the host’s immune response. However, while initial findings are promising, the evidence is not uniformly strong, and more large-scale, long-term studies are needed to confirm efficacy and determine optimal strains and dosages. In summary, the use of mixed Lactobacillus species for halitosis is backed by moderate-quality scientific evidence, with positive but not conclusive results.

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