It is recommended to continue to take iron orally for 3–6 months after normalization of Hb in order to replenish iron stores (ferritin).[1] Long-term supplementation of iron without monitoring iron blood markers is not recommended, however, as the side effects of high iron levels can be severe.[2]
How long should iron be taken?
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•Last Updated: May 16, 2025
Iron should be taken orally for 3 to 6 months after hemoglobin levels normalize to replenish iron stores, but long-term supplementation without monitoring is not advised due to potential severe side effects from high iron levels.