Plasma phosphate and intact FGF23 in normal and uremic rats at 48 hours (a + b) and 1 week (c + d) after vehicle or a single high dose of intravenous iron isomaltoside (IIM) or ferric carboxymaltose (FCM). Compared to vehicle, intravenpous iron had no significant effect on plasma phosphate and iFGF23 levels in normal and uremic rats, neither within the first 48 hours nor 1 week after the injection. Within the single group some significant variations in both phosphate and iFGF23 levels were observed, but not different from what was observed in the vehicle group. Mean ± SEM. *p < 0.05 vs 0 minutes, **p < 0.01 vs 0 minutes within the groups.