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 .
Effect of administration of Streptococcus salivarius K12 on the occurrence of streptococcal pharyngo-tonsillitis, scarlet fever and acute otitis media in 3 years old children.
OBJECTIVE Streptococcus salivarius K12 ( BLIS K12 ) is a probiotic strain strongly antagonistic to the growth of Streptococcus pyogenes , the most important bacterial cause of pharyngeal infections in humans . Shown to colonize the oral cavity and to be safe for human use , BLIS K12 has previously been reported to reduce pharyngo-tonsillitis episodes in children or adults known to have experienced recurrent streptococcal infection . The present study was focussed upon evaluating the role of BLIS K12 in the control of streptococcal disease and acute otitis media in children attending the first year of kindergarten . PATIENTS AND METHODS By r and omization , 222 enrolled children attending the first year of kindergarten were divided into a  treated group ( N = 111 ) receiving for 6 months a daily treatment with BLIS K12 ( Bactoblis ® ) and a control group ( N = 111 ) who were monitored as untreated controls . During the 6 months of treatment and 3 months of follow-up , the children were evaluated for treatment tolerance , and for episodes of streptococcal pharyngo-tonsillitis , scarlet fever and acute otitis media . RESULTS During the 6-month trial ( N = 111 per group ) the incidence of streptococcal pharyngo-tonsillitis , scarlet fever and acute otitis media was approximately 16 % , 9 % and 44 % respectively in the treated group and 48 % , 4 % and 80 % in the control group . During the 3-months follow-up ( N = 29 per group ) the corresponding rates of infection were 15 % , 0 % and 12 % in the treated group and 26 % , 6 % and 36 % in the controls . No apparent side effects were detected in the treated group either during treatment or follow-up . All of the enrolled children completed the study . CONCLUSIONS The daily administration of BLIS K12 to children attending their first year of kindergarten was associated with a significant reduction in episodes of streptococcal pharyngitis and acute otitis media . No protection against scarlet fever was detected
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 .