What is this study trying to find out about iron absorption?

This study is evaluating iron needs in adults living in the US using a stable iron isotope technique. It aims to improve dietary iron guidelines to better fit the US population. The research is sponsored by the Pennington Biomedical Research Center and includes both men and premenopausal women.

Who may be eligible for this iron absorption clinical trial?

Adults aged 18 to 50 years who are male or premenopausal female may be eligible. Participants should be willing to take an oral stable iron isotope, avoid iron supplements, tobacco smoking, and blood donation during the study. Please review eligibility criteria for more details.

Is there any cost to participate in this iron absorption clinical trial?

Study-related care, including the study procedures and all trial visits, is provided at no cost. Personal travel expenses may vary and are not guaranteed to be covered.

Actively Recruiting

Phase Not Applicable

Age: 18Years - 50Years

All Genders

Healthy Volunteers

ID07139821

Study to Determine Dietary Iron Needs in US Adults Ages 18 to 50

Led by Pennington Biomedical Research Center · Updated on 2026-04-29

300

Participants Needed

Research Sites

43 weeks

Total Duration

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

Age: 18Years - 50Years

All Genders

Healthy Volunteers

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

Research Team

Stephen Hennigar, PhD

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