Table 3.

Most common formulations and elemental iron content in oral ferrous iron supplements. Adapted from Ning and Zeller, 2019 [58].

Compound	Formulation	Elemental Iron Content (mg)	Recommended Dosage
Ferrous gluconate	Tablet, 240 mg	27	1–3 tablets once per day or on an alternate-day schedule [58]
Ferrous sulfate	Tablet, 325 mg	65	1–2 tablets once per day or on an alternate-day schedule [58]
Ferrous fumarate	Tablet, 324 mg	106	1 tablet once per day or on an alternate-day schedule [58]