Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Adverse effects
Systematic review	42 women Data from 1 RCT	Number of women reporting adverse effects 3 with fish oil capsules (twice daily for 1 month) 0 with placebo (twice daily for 1 month)
RCT 4-armed trial	78 women with primary dysmenorrhoea	Adverse effects with fish oil (0.5–1.0 g five times daily) for a minimum of 3 months with placebo for a minimum of 3 months Absolute results not reported