Methods	Single blind community experimental study in Indonesia RCT (with a nonrandomised third arm) Study conducted between August to December 1998
Participants	N = 137 postmenarchal female adolescent students
Interventions	Intervention: (1) 48 students got an iron tablet weekly; (2) 41 students took an iron tablet for four consecutive days during their menstruation cycle. Iron tablet included 60 mg elemental iron and 0.25 mg folic acid in the form of 200 mg ferrous sulphate Control: Forty eight students received a placebo tablet weekly Setting: school‐level, community based Timing of intervention: preconception Moderators delivering: teachers
Outcomes	Primary: Haemoglobin, serum ferritin, height, weight, mid‐upper arm circumference and dietary intake. Prevalence of anaemia
Notes	Funding: SEAMEO‐TROPMED Regional Center for Community Nutrition in Jakarta Declaration of interest: NA