Actively Recruiting
Dietary Iron Requirements in US Adults
Led by Pennington Biomedical Research Center · Updated on 2026-04-29
300
Participants Needed
2
Research Sites
43 weeks
Total Duration
On this page
Sponsors
P
Pennington Biomedical Research Center
Lead Sponsor
C
Cornell University
Collaborating Sponsor
AI-Summary
What this Trial Is About
Researchers are studying iron requirements in a representative group of adult men and premenopausal women living in the United States. This research aims to improve dietary iron guidelines by using the iron isotope dilution technique to better reflect the needs of the US population. The study involves adults aged 18 to 50 who have either participated in a previous isotope study or are willing to take part in a new one. Participants will receive a stable iron isotope and then be monitored over a 12-week period. Blood samples will be collected every 4 weeks to measure the iron isotope composition. This helps researchers understand how the body absorbs and uses iron. During the study, participants will undergo blood collection and provide consent for storing blood samples for future research. Researchers will track the iron isotope levels in the blood as the main outcome. Participants must follow study rules such as avoiding iron supplements, tobacco smoking, and blood donation during the study. The entire process takes about 12 weeks, with regular blood tests and monitoring.
CONDITIONS
Brief Title
Dietary Iron Requirements
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Males and premenopausal females age 18-50 years
- 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
You will not qualify if you...
- 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
AI-Screening
AI-Powered Screening
Complete this quick 3-step screening to check your eligibility
Your Study Journey
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Duration - Approximately 12 months
Participants consume an oral stable iron isotope and undergo a one-year equilibration period to determine dietary iron requirements.
Visits scheduled as needed for intake and monitoring
Duration - Up to 12 weeks following the equilibration period
Blood samples are collected to measure iron isotope composition.
1 to 2 visits depending on sampling schedule
Trial Site Locations
Total: 2 locations
1
LSU Pennington Biomedical Research Center
Baton Rouge, Louisiana, United States, 70808
Actively Recruiting
2
Cornell University
Ithaca, New York, United States, 14853
Actively Recruiting
Research Team
S
Stephen Hennigar, PhD
How is the study designed?
Study Type
INTERVENTIONAL
Masking
NONE
Allocation
NA
Model
SINGLE_GROUP
Primary Purpose
OTHER
Number of Arms
1
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