Iron status indices and hepcidin profiles during control and supplementation days with 40 mg Fe and 240 mg Fe (Study 1). (A,D) Transferrin saturation (%TS). (B,E) Plasma hepcidin (nM) and (C,F) PF (µg/L). *Significantly different concentration from reference concentration (control day, 8:00 am). Supplementation days are indicated with the symbol “Fe” in the x-axis. Data are presented as geometric means with brackets indicating the interquartile range.