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Dietary Iron Requirements | Clinical Trials | Clareo Health

NOT_YET_RECRUITING

Dietary Iron Requirements

Dietary Iron Requirements in US Adults

NCT07139821•Pennington Biomedical Research Center

Summary

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.

Eligibility

Age

18 - 50 years

Sex

ALL

Healthy Volunteers

Yes

Inclusion Criteria

•Males and premenopausal females age 18-50 y
•Previously participated in an iron stable isotope study or willing to consume an oral stable iron isotope and undergo a one-year equilibration period
•Willing to refrain from iron-containing supplements for the duration of the study
•Willing to refrain from tobacco smoking for the duration of the study
•Have not donated blood 3 months prior to the start of the study and willing to refrain from donating blood for the duration of the study
•Willing to have blood stored for future use
•Able and willing to comply with study requirements and consent to participate

Exclusion Criteria

•Females: pregnant or lactating or plans to become pregnant during the study period
•Inability to provide informed consent and engage in informed consent procedures
•Plans to relocate outside the study area

Locations (2)

LSU Pennington Biomedical Research Center

Baton Rouge, Louisiana, United States

Cornell University

Ithaca, New York, United States

Key Dates

Start Date

January 1, 2026

Primary Completion Date

August 1, 2028

Completion Date

May 31, 2029

Last Updated

December 5, 2025

Enrollment

300

ESTIMATED participants

Conditions

Iron Absorption

Contacts

Stephen Hennigar, PhD

CONTACT

225-763-2612 stephen.hennigar@pbrc.edu

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Data Source & Attribution

This clinical trial information is sourced from ClinicalTrials.gov, a service of the U.S. National Institutes of Health.

ClinicalTrials.gov last update: December 5, 2025Data synced to Clareo: March 29, 2026

Modifications: This data has been reformatted for display purposes. Eligibility criteria have been parsed into inclusion/exclusion sections. Location data has been geocoded to enable distance-based search. For the authoritative and most current information, please visit ClinicalTrials.gov.

Neither the United States Government nor Clareo Health make any warranties regarding the data. Check ClinicalTrials.gov frequently for updates.

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Dietary Iron Requirements

Inclusion Criteria

Exclusion Criteria

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