Dietary Iron Requirements
Key facts
- Who runs it
- Pennington Biomedical Research Center
- Where
- Baton Rouge and Ithaca, United StatesSee the 2 sites
- Trial code
- Status
- Recruiting
- People taking part
- 300 people, planned
- Started
- 6 Feb 2026
- Expected to end
- 31 May 2029
- Type of study
- Interventional
- Treatments tested
- Stable iron isotope
- Record updated
- 29 April 2026
Who can take part
- Age
- 18 years to 50 years
- Sex
- Women and men
- Healthy volunteers
- Can take part
The registry criteria, word for word
Show all 10 criteriaShow less
Who can take part
- 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
Who cannot take part
- 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
Check if you might fit
Answer for yourself. This is not a decision: only the study team can say whether you can take part.
- Are you between 18 and 50 years old?
Where in United States
- LSU Pennington Biomedical Research CenterBaton Rouge, United StatesContact: Stephen Hennigar, PhDTaking people
- Cornell UniversityIthaca, United StatesContact: Kimberly O'Brien, PhDTaking people
About the trial
What the trial wants to find out
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.
The group in the trial
- US males and premenopausal femalesTreatment being tested
A representative sample of adult males and premenopausal females living in the US
Treatment: Stable iron isotope
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Contact the study team: see the registry record → Contacts and Locations
Print a page for my doctorData and sources
- Registry record
- Listed on ClinicalTrials.gov.
- Official title
- Dietary Iron Requirements in US Adults
- Fit questions
- Built from NCT07139821, who can take part
- Record updated
- 29 April 2026