Dietary Iron Requirements

Dietary Reference Intakes (DRIs) for iron are based on a relatively small number of studies in European populations. This research study will determine iron needs in a representative sample of adults living in the US using the iron isotope dilution technique. Following administration and equilibration of a stable iron isotope, participants will be followed for a 12 week study period. Blood will be collected every 4 weeks and the isotopic composition will be determined. Results will help update dietary iron guidelines making sure they better match the specific needs of the US population.

NCT Number	NCT07139821
Lead Sponsor	Pennington Biomedical Research Center Collaborators: Cornell University
Conditions	Iron Absorption
Enrollment	300 participants
Start Date	2026-02-06
Primary Completion	2028-08-01 (estimated)
Study Completion	2029-05-31 (estimated)
Updated on ClinicalTrials.gov	2026-04-29