Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Symptom improvement
RCT	33 men In review	Mean improvement in total National Institutes of Health-Chronic Prostatitis Symptom Index (NIH-CPSI) scores 1 month from 21 to 13 with quercetin from 20.2 to 18.8 with placebo	P = 0.003	Effect size not calculated	quercetin
RCT	33 men In review	Clinically meaningful improvement (more than 25% improvement in NIH-CPSI scores) 1 month 67% with quercetin 20% with placebo Absolute numbers not reported	P = 0.001	Effect size not calculated	quercetin
RCT	33 men In review	Urinary dysfunction 1 month with quercetin with placebo Absolute results not reported	Reported as not significant P value not reported		Not significant