Kiss 2013.

Methods	Type of study: parallel, 2‐arm randomised controlled trial Country of study: USA Study setting: not reported Number of participants randomised: 214 (numbers in each treatment arm not reported) Number of participants analysed: Treatment arm 1: 106 Treatment arm 2: 101 Follow‐up time points: day 56 after baseline donation Source of funding: not reported
Participants	Repeat donors (more than 1 donation in past year) Mean age (years): not reported Sex (male/female): 37%/63%
Interventions	Treatment arm 1: oral iron 39 mg taken daily for 24 weeks. Total dose: 6552 mg Treatment arm 2: oral placebo, taken daily for 24 weeks
Outcomes	Haemoglobin; serum ferritin; time to recovery of 80% of post‐donation decrease in haemoglobin; % donors with venous Hb < 125 g/L at day 56 post‐donation; reticulocyte counts (in a subset of donors)
Notes	Insufficient information was included in this conference abstract for inclusion in the review. No further publications of this study have been identified