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 .
Lactobacillus salivarius WB21--containing tablets for the treatment of oral malodor: a double-blind, randomized, placebo-controlled crossover trial.
OBJECTIVE This study evaluated the effect of probiotic intervention using lactobacilli on  oral malodor . STUDY DESIGN We conducted a 14-day , double-blind , placebo-controlled , r and omized crossover trial of tablets containing Lactobacillus salivarius WB21 ( 2.0 × 10(9 ) colony-forming units per day ) or placebo taken orally by patients with oral malodor .  RESULTS Organoleptic test scores significantly decreased in both the probiotic and placebo periods compared with the respective baseline scores ( P < .001 and P = .002 ) , and no difference was detected between periods . In contrast , the concentration of volatile sulfur compounds ( VSCs ) ( P = .019 ) and the average probing pocket depth ( P = .001 ) decreased significantly in the probiotic period compared with the placebo period . Bacterial quantitative analysis found significantly lower levels of ubiquitous bacteria ( P = .003 ) and Fusobacterium nucleatum ( P = .020 ) in the probiotic period . CONCLUSIONS These results indicated that daily oral consumption of tablets containing probiotic lactobacilli could help to control oral malodor and malodor-related factors
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 .