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. 2021 Jun 5;6(9):2261–2269. doi: 10.1016/j.ekir.2021.05.020

Table 1.

Major oral iron supplements available24, 25, 26

Supplement Elemental iron per dosage unit Frequency
Ferrous sulfate 65 mg/tableta 1 tablet, 1–3 times per day
Ferrous gluconate 38 mg/tablet a 1 tablet, 1–3 times per day
Ferrous fumarate 106 mg/tablet a 1 tablet, 1–3 times per day
Ferric maltol 30 mg/tablet 1 tablet, twice per day
Ferric citrate 210 mg/tablet 1-2 tablets, 3 times per day
Liposomal iron 30 mg/tablet 1 tablet per day
a

For 325-mg tablets.