Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Breath odour
RCT Crossover design 4-armed trial	21 people	Proportion of people reporting reduction in organoleptic breath scores from baseline day 14 67% with combination of zinc acetate, chlorhexidine diacetate, and sodium fluoride mouthwash plus tongue scraping 24% with placebo mouthwash Absolute numbers not reported	Not reported