The usefulness of elemental iron for cereal flour fortification: a SUSTAIN Task Force report. Sharing United States Technology to Aid in the Improvement of Nutrition

Richard Hurrell, Thomas Bothwell, James D Cook, Omar Dary, Lena Davidsson, Susan Fairweather-Tait, Leif Hallberg, Sean Lynch, Jorge Rosado, Tomas Walter, Paul Whittaker, SUSTAIN Task Force

Research output: Contribution to journalArticlepeer-review

92 Citations (Scopus)


Fortification of cereal flours may be a useful public health strategy to combat iron deficiency. Cereal flours that are used shortly after production (e.g., baking flour) can be fortified with soluble iron compounds, such as ferrous sulfate, whereas the majority of flours stored for longer periods is usually fortified with elemental iron powders to avoid unacceptable sensory changes. Elemental iron powders are less well absorbed than soluble iron compounds and they vary widely in their absorption depending on manufacturing method and physicochemical characteristics. Costs vary with powder type, but elemental iron powders are generally less expensive than ferrous sulfate. This review evaluates the usefulness of the different elemental iron powders based on results from in vitro studies, rat assays, human bioavailability studies, and efficacy studies monitoring iron status in human subjects. It concludes that, at the present time, only electrolytic iron powder can be recommended as an iron fortificant. Because it is only approximately half as well absorbed as ferrous sulfate, it should be added to provide double the amount of iron.
Original languageEnglish
Pages (from-to)391-406
Number of pages16
JournalNutrition Reviews
Issue number12
Publication statusPublished - Dec 2002


  • Anemia, Iron-Deficiency
  • Animals
  • Biological Availability
  • Cereals
  • Flour
  • Food, Fortified
  • Humans
  • Intestinal Absorption
  • Iron Compounds
  • Iron, Dietary

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