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 different mouthrinses on morning breath.
BACKGROUND Morning breath odor is an often-encountered complaint . This double-blind , crossover , r and omized study aim ed to examine the bad breath-inhibiting effect of 3 commercially available mouthrinses on morning halitosis during an experimental period of 12 days without mechanical plaque control . METHODS Twelve medical students with a healthy periodontium refrained from all means of mechanical plaque control during 3 experimental periods of 12 days ( with intervening washout periods of at least 3 weeks ) . A professional oral cleaning preceded each period . During each experimental period , as the only oral hygiene measure allowed , the students rinsed twice a day with one of the following formulations in a r and omized order : CHX-Alc ( a 0.2 % chlorhexidine [ CHX ] solution ) ; CHX-NaF ( CHX 0.12 % plus sodium fluoride 0.05 % ) ; or CHX-CPC-Zn ( CHX 0.05 % plus cetylpyridinium chloride 0.05 % plus zinc lactate 0.14 % ) . After 12 days , morning breath was scored via volatile sulfur compound ( VSC ) level measurements of the mouth air and organoleptic ratings of the mouth air , the expired air , and a scraping of the tongue coating . At the 12-day visit , a question naire ( subjective ratings ) was completed and sample s taken from both the tongue coating and the saliva for anaerobic and aerobic culturing and vitality staining . The de novo supragingival plaque formation was also recorded . All parameters were correlated with the baseline registration s. RESULTS Although oral hygiene during the 3 experimental periods was limited to oral rinses , bad breath parameters systematic ally improved , with the exception of a slight increase in VSC levels while using CHX-Alc , a finding which was associated with the direct influence of the CHX on the sulfide monitor . The oral microbial load after the use of CHX-NaF remained unchanged , while for the CHX-Alc and CHX-CPC-Zn , significant reductions in both aerobic and anaerobic colony forming units (CFU)/ml were noticed in comparison with baseline data for both tongue coating and saliva sample s. The composition of microflora , on the other h and , did not reveal significant changes . The supragingival plaque formation was inhibited , in descending order , by CHX-Alc , CHX-CPC-Zn , and CHX-NaF. The subjective scores for the rinses indicated a higher appreciation for CHX-CPC-Alc and CHX-NaF because of a better taste and fewer side effects . CONCLUSIONS The results of this study demonstrate that morning halitosis can be successfully reduced via daily use of mouthrinses . CHX-Alc and CHX-CPC-Zn mouthrinses result in a significant reduction of the microbial load of tongue and saliva
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 .