Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Breath odour
RCT 4-armed trial	99 people	Mean odour score change from baseline 4 hours –0.94 with cetylpyridinium chloride mouthwash –0.52 with chlorine dioxide plus zinc mouthwash –0.42 with essential oil mouthwash	P <0.05 for cetylpyridinium chloride mouthwash v other active treatments	Effect size not calculated	single-use cetylpyridinium chloride mouthwash