Current evidence is supportive of recommending probiotics for the management of halitosis .
Based on this review , transient ( average of 2 weeks ) dosing with probiotics ( mainly Lactobacillus strains ) has a moderate effect on halitosis regarding OLT scores , but we could not confirm the effects of probiotics on the VSC reduction .
Although several studies have evaluated the inhibitory effect of  probiotics  on  halitosis  , findings are inconsistent .
This systematic review and meta- analysis of r and omized clinical trials ( RCT ) was conducted to summarize the evidence on the effect of  probiotics on halitosis .
Impact of Chlorhexidine Pretreatment Followed by Probiotic Streptococcus salivarius Strain K12 on Halitosis in Children: A Randomised Controlled Clinical Trial.
PURPOSE The aim of this study was to examine the effect of chlorhexidine disinfection , as a chemical method of oral hygiene practice , and subsequent use of probiotics on  halitosis in children . The effects of mechanical and chemical oral hygiene practice methods on the severity of halitosis were also assessed . MATERIAL S AND METHODS 208 children with organoleptic test ( OLT ) scores of 2 or more were r and omly assigned to four groups : A : conventional oral hygiene practice s ( COH ) including toothbrushing and flossing ; B : COH + tongue scraping ( TS ) ; C : COH + TS + chlorhexidine ; D : COH + TS + chlorhexidine + probiotics . OLT was performed at 1-week and 3-month follow-ups . RESULTS A significant and stable number of participants showed major and moderate levels of improvement in OLT scores in group D ( p < 0.001 ) . The improvement of OLT scores in group C was also significant ( p < 0.001 ) , but not stable over the follow-ups ( p = 0.44 ) . Neither significant nor stable improvements in the OLT scores were detected in groups A and B through follow-ups ( p > 0.05 ) . CONCLUSION Probiotic therapy following oral disinfection with chlorhexidine may reduce the severity of halitosis over longer periods
Current evidence is supportive of recommending probiotics for the management of halitosis .
Based on this review , transient ( average of 2 weeks ) dosing with probiotics ( mainly Lactobacillus strains ) has a moderate effect on halitosis regarding OLT scores , but we could not confirm the effects of probiotics on the VSC reduction .
Although several studies have evaluated the inhibitory effect of  probiotics  on  halitosis  , findings are inconsistent .
This systematic review and meta- analysis of r and omized clinical trials ( RCT ) was conducted to summarize the evidence on the effect of  probiotics on halitosis .