Leonard 2014.

Methods	Design: randomised controlled trial Randomisation: individual Trial: daily oral iron (two doses) versus placebo Date of study: 2010 to 2013
Participants	Setting: women recruited via flyer through the Hunter Medical Research Institute (Australia) Malaria endemicity: not stated Included: women aged 18 years to 35 years (mean age 26 years) with BMI between 18 kg/m² and 30 kg/m² and English speaking Excluded: iron deficient in last 12 months, taking iron, chronic medical condition or pregnant Dropouts: 12 out of 36 lost to follow‐up Sample size: total: 24; intervention: 16, control: 8
Interventions	Intervention: 60 mg or 80 mg elemental iron as ferrous sulphate Control: placebo Duration: 16 weeks
Outcomes	Haemoglobin, iron status, side effects and cognitive outcomes
Notes	Compliance: on average 90.4% of capsules taken Conflicts of interest: authors declare no conflict of interest Funded by: Australian Post‐Graduate Award, Meat and Livestock Australia and the School of Health Sciences at the University of Newcastle
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Random number generator
Allocation concealment (selection bias)	Low risk	Reports concealment
Blinding of participants and personnel (performance bias) All outcomes	Low risk	Blinded
Blinding of outcome assessment (detection bias) All outcomes	Low risk	No evidence
Incomplete outcome data (attrition bias) All outcomes	High risk	> 30% loss in many groups
Selective reporting (reporting bias)	Low risk	Not evident
Other bias	Low risk	Not evident