Pereira 2014.

Methods	Design: randomised controlled trial Randomisation: individual Trial: daily oral iron versus placebo Date of study: not stated
Participants	Setting: King's College, London, United Kingdom. Malaria endemicity: not stated Included: 20 healthy participants, 7 men and 13 women aged 18 to 65 years (mean age 32 years) Excluded: chronic disease, pregnancy or lactation Dropouts: reports no loss to follow‐up Sample size: total: 13; intervention: 7, control: 6
Interventions	Intervention: ferrous sulphate 200 mg (65 mg of elemental iron), twice a day Control: placebo Duration: 7 days
Outcomes	Side effects
Notes	Compliance: not stated Conflicts of interest: authors declare no conflict of interest Funded by: United Kingdom Medical Research Council Other notes: data for women only, provided by authors via email
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Random sequence generation
Allocation concealment (selection bias)	Low risk	Reported allocation concealment
Blinding of participants and personnel (performance bias) All outcomes	Low risk	Placebo
Blinding of outcome assessment (detection bias) All outcomes	Low risk	SEs unlikely to be affected
Incomplete outcome data (attrition bias) All outcomes	Low risk	No losses to follow‐up
Selective reporting (reporting bias)	Low risk	Not evident
Other bias	Low risk	Not evident