Independent directory Public ClinicalTrials.gov records United States
Clinical Trials Finder
Objective public record navigation
Search Results

Search by objective public record fields.

Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results are retrieved from ClinicalTrials.gov and synchronized into the directory. Search pages remain noindex by default.

Clear filters
ClinicalTrials.gov public records Last synced Jul 21, 2026, 5:27 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–24 of 24 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Condition: Iron Absorption Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Vitamin C on Iron Absorption

NCT00570895
View directory record Official record
Conditions
Iron Deficiency
Interventions
Vitamin C
Dietary Supplement
Lead sponsor
Baylor College of Medicine
Other
Eligibility
4 Years to 8 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 25, 2020 · Synced Jul 21, 2026, 5:27 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

The Immediate and Long-term Effects of a Novel Marine-based Iron Supplement in Adult Females

NCT07199244
View directory record Official record
Conditions
Anemia, Iron Deficiency (Without Anemia), Iron Absorption
Interventions
marine-based heme iron
Dietary Supplement
Lead sponsor
Nutraceuticals Research Institute
Other
Eligibility
21 Years to 42 Years · Female only
Enrollment
61 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Huntsville, Alabama
Source: ClinicalTrials.gov public record
Updated Sep 29, 2025 · Synced Jul 21, 2026, 5:27 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Bioavailability of Zinc and Iron From a Whey-based Protein Supplement Consumed With a Habitual Plant-based Diet

NCT02208622
View directory record Official record
Conditions
Nutritional Deficiency
Interventions
Study 1: Whey Supplement Day 1, Study 1: Whey Supplement Day 2, Study 2: Whey Supplement
Dietary Supplement
Lead sponsor
University of Colorado, Denver
Other
Eligibility
2 Years to 3 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 4, 2019 · Synced Jul 21, 2026, 5:27 PM EDT
Recruiting Not applicable Interventional

Iron Absorption in The Low Oxygen Exposure and Weight Status (LOWS) Study

NCT07542873
View directory record Official record
Conditions
Obesity (Disorder)
Interventions
Normobaric hypoxia (NH), Normobaric normoxia (NN)
Other
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
22 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Apr 20, 2026 · Synced Jul 21, 2026, 5:27 PM EDT
Completed Phase 2 Interventional Results available

Anemia Studies in CKD: Erythropoiesis Via a Novel Prolyl Hydroxylase Inhibitor (PHI) Daprodustat- Iron (ASCEND: Fe)

NCT03457701
View directory record Official record
Conditions
Anaemia
Interventions
Daprodustat, rhEPO, Ferrous sulfate containing the stable iron isotope (57Fe), Ferrous sulfate containing the stable iron isotope (58Fe)
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
3
States / cities
Fort Worth, Texas • Lufkin, Texas • San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Mar 26, 2024 · Synced Jul 21, 2026, 5:27 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Relative Contributions of Red Cell Catabolism and Dietary Absorption to Fetal Iron Accretion During Pregnancy

NCT01588665
View directory record Official record
Conditions
Iron Deficiency
Interventions
Not listed
Lead sponsor
Cornell University
Other
Eligibility
15 Years to 35 Years · Female only
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2022
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Jul 11, 2023 · Synced Jul 21, 2026, 5:27 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Genetic Variants and Iron Absorption

NCT02197624
View directory record Official record
Conditions
Iron Absorption
Interventions
Not listed
Lead sponsor
Cornell University
Other
Eligibility
18 Years to 35 Years · Female only
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Ithaca, New York
Source: ClinicalTrials.gov public record
Updated Jul 22, 2014 · Synced Jul 21, 2026, 5:27 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Meals to Improve Absorption of Iron Supplements

NCT04793906
View directory record Official record
Conditions
Iron-deficiency, Iron Deficiency Anemia, Iron Deficiency Anemia Treatment
Interventions
Iron supplement with a lunch meal containing beef, Iron supplement with a lunch meal containing plant-based alternative
Other
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Feb 6, 2025 · Synced Jul 21, 2026, 5:27 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Iron Bioavailability From MyPyramid Menus

NCT00754234
View directory record Official record
Conditions
Nonheme Iron Absorption
Interventions
My Pyramid menu days 1, 2, 3, 4, 5, 6 or 7
Behavioral
Lead sponsor
USDA Grand Forks Human Nutrition Research Center
Federal
Eligibility
21 Years to 50 Years · Female only
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Grand Forks, North Dakota
Source: ClinicalTrials.gov public record
Updated Jul 1, 2018 · Synced Jul 21, 2026, 5:27 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Sprinkles With and w/o Fe on Zn Absorption in Kenyan Toddlers

NCT02101723
View directory record Official record
Conditions
Micronutrient Deficiencies
Interventions
MNP + Zn/Fe, MNP + Zn, Placebo
Dietary Supplement
Lead sponsor
University of Colorado, Denver
Other
Eligibility
5 Months to 10 Months
Enrollment
63 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2016
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated May 20, 2018 · Synced Jul 21, 2026, 5:27 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Iron Absorption in Vegetarian Children

NCT01489007
View directory record Official record
Conditions
Iron Absorption
Interventions
Not listed
Lead sponsor
Baylor College of Medicine
Other
Eligibility
4 Years to 10 Years
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 25, 2020 · Synced Jul 21, 2026, 5:27 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

The Effects of Repeated Operational Stress and Limited Recovery on Resilience Capacity

NCT06784544
View directory record Official record
Conditions
Sleep, Inadequate, Energy Deficit, Iron Absorption, High Physical Activity
Interventions
Operational Stressors
Other
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
17 Years to 39 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 19, 2025 · Synced Jul 21, 2026, 5:27 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Test of Iron Malabsorption in Patients With Iron Deficiency Anemia

NCT00399191
View directory record Official record
Conditions
Iron Deficiency Anemia
Interventions
stable isotope of iron, dysprosium
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
20 Years to 40 Years · Female only
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2006
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Mar 17, 2010 · Synced Jul 21, 2026, 5:27 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Absorption of Heme and Non-Heme Iron in Pregnant and Non-pregnant Women and Mechanisms of Fetal Iron Transfer

NCT01019096
View directory record Official record
Conditions
Iron Deficiency
Interventions
Not listed
Lead sponsor
Cornell University
Other
Eligibility
15 Years to 35 Years · Female only
Enrollment
55 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
2
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Mar 21, 2012 · Synced Jul 21, 2026, 5:27 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Iron Absorption and Exercise

NCT04079322
View directory record Official record
Conditions
Iron-deficiency, Iron Deficiency Anemia
Interventions
Meal
Other
Lead sponsor
Florida State University
Other
Eligibility
Not listed
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Feb 26, 2020 · Synced Jul 21, 2026, 5:27 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Glycoprotein Matrix-Bound Iron Improves Iron Absorption

NCT06738199
View directory record Official record
Conditions
Evaluation of Bioavailability of Supplemental Forms of Iron
Interventions
dietary iron supplementation
Dietary Supplement
Lead sponsor
University of Mary Hardin-Baylor
Other
Eligibility
18 Years to 45 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Belton, Texas
Source: ClinicalTrials.gov public record
Updated Dec 16, 2024 · Synced Jul 21, 2026, 5:27 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Zinc and Iron Absorption From Common Beans in Young Adult Women

NCT06327529
View directory record Official record
Conditions
Zinc Absorption, Iron Absorption
Interventions
SER 118, LMP 1001, LPA 586, KAT B1
Other
Lead sponsor
University of California, Davis
Other
Eligibility
19 Years to 24 Years · Female only
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Feb 19, 2026 · Synced Jul 21, 2026, 5:27 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Iron Absorption From Iron-enriched Aspergillus Oryzae

NCT03156712
View directory record Official record
Conditions
Iron-deficiency, Absorption; Iron, Anemia, Iron Deficiency, Bioavailability, Serum Iron
Interventions
Ferrous sulfate
Dietary Supplement
Lead sponsor
Iowa State University
Other
Eligibility
18 Years to 35 Years · Female only
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Ames, Iowa
Source: ClinicalTrials.gov public record
Updated May 17, 2017 · Synced Jul 21, 2026, 5:27 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Zinc and Iron Bioavailability From Biofortified Pearl Millet

NCT01783067
View directory record Official record
Conditions
Nutritional Deficiency
Interventions
Pearl millet, Biofortified pearl millet
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Months to 36 Months
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 27, 2016 · Synced Jul 21, 2026, 5:27 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Dietary Iron Requirements

NCT07139821
View directory record Official record
Conditions
Iron Absorption
Interventions
Stable iron isotope
Other
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 50 Years
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
2
States / cities
Baton Rouge, Louisiana • Ithaca, New York
Source: ClinicalTrials.gov public record
Updated Apr 28, 2026 · Synced Jul 21, 2026, 5:27 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

The Effects of Acute Erythropoietin on Hepcidin and Dietary Iron Absorption Following Military-relevant Exercise in Energy Deficit: Pilot Study

NCT07517562
View directory record Official record
Conditions
Iron Absorption
Interventions
Exercise test
Other
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 45 Years
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Apr 7, 2026 · Synced Jul 21, 2026, 5:27 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Ethnic Differences in Iron Absorption (FeGenes)

NCT04198545
View directory record Official record
Conditions
Anemia, Iron Deficiency, Iron Overload
Interventions
Not listed
Lead sponsor
Cornell University
Other
Eligibility
18 Years to 50 Years
Enrollment
515 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2025
U.S. locations
2
States / cities
Ithaca, New York • Rochester, New York
Source: ClinicalTrials.gov public record
Updated Aug 5, 2025 · Synced Jul 21, 2026, 5:27 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Encapsulated Calcium Absorption in Pregnancy

NCT01678079
View directory record Official record
Conditions
Pregnancy
Interventions
Encapsulated Calcium, Non-capsulated Calcium
Dietary Supplement
Lead sponsor
The Hospital for Sick Children
Other
Eligibility
18 Years to 30 Years · Female only
Enrollment
61 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
2
States / cities
Baltimore, Maryland • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Nov 17, 2014 · Synced Jul 21, 2026, 5:27 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Heme and Non-heme Iron Intakes, Gut Microbiota, and Influence on Host Iron Absorption

NCT06146608
View directory record Official record
Conditions
Anemia, Iron Deficiency, Iron Overload
Interventions
Not listed
Lead sponsor
Cornell University
Other
Eligibility
18 Years to 40 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Ithaca, New York
Source: ClinicalTrials.gov public record
Updated Feb 23, 2025 · Synced Jul 21, 2026, 5:27 PM EDT