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ClinicalTrials.gov public records Last synced Oct 7, 2026, 6:57 AM EDT

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Showing 25–48 of 115 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Stable isotopes Clear all
Terminated Not applicable Interventional Results available

Calcium-41 (41Ca) Chloride Aqueous Solution in Diagnosing Patients With Prostate Cancer and Bone Metastasis

NCT00918645
View directory record Official record
Conditions
Metastatic Cancer, Prostate Cancer
Interventions
41 Ca
Drug
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older · Male only
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
Livermore, California
Source: ClinicalTrials.gov public record
Updated Dec 22, 2017 · Synced Oct 7, 2026, 6:57 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Imaging Oxidative Metabolism and Neurotransmitter Synthesis in the Human Brain

NCT03849963
View directory record Official record
Conditions
Brain Metabolism
Interventions
Not listed
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 60 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2030
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Mar 12, 2026 · Synced Oct 7, 2026, 6:57 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Effects of Colesevelam HCl On Bile Acid Kinetics

NCT00476710
View directory record Official record
Conditions
Type 2 Diabetes Mellitus, Impaired Glucose Tolerance
Interventions
Colesevelam HCl
Drug
Lead sponsor
KineMed
Industry
Eligibility
40 Years to 60 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Apr 1, 2015 · Synced Oct 7, 2026, 6:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

AECOPD and Nutritional Supplementation in COPD

NCT06801964
View directory record Official record
Conditions
Obstructive Pulmonary Disease, Exacerbation Copd
Interventions
Stable isotope infusion, Protein and Fish Oil, Protein and Olive Oil, Carbohydrate and Olive Oil
Other · Dietary Supplement
Lead sponsor
Texas A&M University
Other
Eligibility
45 Years and older
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Jan 30, 2025 · Synced Oct 7, 2026, 6:57 AM EDT
Completed Not applicable Interventional

Cholesterol and Statin in Healthy Adults

NCT02908425
View directory record Official record
Conditions
Elevated HMB Excretion
Interventions
Statin user
Other
Lead sponsor
Texas A&M University
Other
Eligibility
65 Years to 80 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Sep 30, 2025 · Synced Oct 7, 2026, 6:57 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Metabolic and Functional Consequences of Aging in Health and Disease

NCT05240885
View directory record Official record
Conditions
Aging
Interventions
Stable tracer infusion in a postabsorptive state
Other
Lead sponsor
Texas A&M University
Other
Eligibility
50 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2028
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Oct 5, 2026 · Synced Oct 7, 2026, 6:57 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Use of Stable Carbon And Nitrogen Isotopes to Improve Dietary Assessment for Cardiovascular Disease

NCT04933656
View directory record Official record
Conditions
Healthy Adults
Interventions
one 24 hr cycle of meals at a 2000 kcal level, one 24 hr cycle of meals at a 2000 kcal level + one serving sugar sweetened beverage, one 24 hr cycle of meals at a 2000 kcal level + two servings sugar sweetened beverage, one 24 hr cycle of meals at a 2000 kcal level + three serving sugar sweetened beverage
Dietary Supplement
Lead sponsor
University of California, San Diego
Other
Eligibility
21 Years to 74 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Jan 26, 2026 · Synced Oct 7, 2026, 6:57 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Anabolic Response to Beef vs Plant Protein in (Pre)Frail Older Adults Using a Novel Stable Isotope Pulse Method

NCT07254403
View directory record Official record
Conditions
Protein Metabolism
Interventions
Beef, Tofu, Placebo
Other
Lead sponsor
Texas A&M University
Other
Eligibility
65 Years to 95 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Nov 28, 2025 · Synced Oct 7, 2026, 6:57 AM EDT
Completed No phase listed Observational

New Stable Isotope Method to Determine Protein Requirements in Critically Ill Children

NCT01511354
View directory record Official record
Conditions
Critically Ill
Interventions
Not listed
Lead sponsor
Texas A&M University
Other
Eligibility
Up to 18 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2013
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Oct 11, 2017 · Synced Oct 7, 2026, 6:57 AM EDT
Completed Phase 1 Interventional Results available

Clearance of 25-hydroxyvitamin D3 During Vitamin D3 Supplementation

NCT03576716
View directory record Official record
Conditions
Chronic Kidney Disease
Interventions
D6-25-hydroxyvitamin D3
Drug
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated May 17, 2022 · Synced Oct 7, 2026, 6:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of EED on Zn Absorption and Retention in Children From a MNP

NCT02758444
View directory record Official record
Conditions
Environmental Enteric Dysfunction, Zinc Deficiency
Interventions
Micronutrient Powder (MNP) + 15 mg Zn, MNP + 10 mg Zn, MNP + 5 mg Zn, MNP without Zn
Dietary Supplement
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Months to 24 Months
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 5, 2019 · Synced Oct 7, 2026, 6:57 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Anabolic Response Cancer

NCT02793531
View directory record Official record
Conditions
Cancer
Interventions
Stable isotope amino acid infusion
Other
Lead sponsor
Texas A&M University
Other
Eligibility
18 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Mar 22, 2018 · Synced Oct 7, 2026, 6:57 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Abscisic Acid Effects on Glucose Homeostasis and Insulin Sensitivity

NCT04722354
View directory record Official record
Conditions
Pre Diabetes
Interventions
Hyperinsulemic euglycemic clamp, Muscle Biopsy, Oral abscisic acid (ABA), Placebo
Other · Procedure · Dietary Supplement
Lead sponsor
AdventHealth Translational Research Institute
Other
Eligibility
18 Years to 65 Years
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Mar 9, 2026 · Synced Oct 7, 2026, 6:57 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Tanita BIA System Validation

NCT02118675
View directory record Official record
Conditions
Body Composition, Circumference Measurements, Tissue Thickness Measurements
Interventions
Body Measurements, Body Composition and Circumference measurements, Whole Body DXA scan, Bioelectrical Impedance Analysis (BIA), BodPod, Circumferences, Ultrasound
Other
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
5 Years to 80 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated May 5, 2017 · Synced Oct 7, 2026, 6:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Intra-Individual Reproducibility of the Non-Invasive Assessment of the Portal Circulation

NCT01579162
View directory record Official record
Conditions
Hepatitis C, Chronic, Non-Alcoholic Fatty Liver Disease
Interventions
Cholate-24-13C (IND 65121) & Cholate-2,2,4,4-d4 (IND 65123)
Device
Lead sponsor
HepQuant, LLC
Industry
Eligibility
22 Years to 65 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 15, 2021 · Synced Oct 7, 2026, 6:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Nutritional Outcomes After Vitamin A Supplementation in Subjects With SCD

NCT03632876
View directory record Official record
Conditions
Sickle Cell Anemia in Children, Vitamin A Deficiency in Children
Interventions
retinyl palmitate
Dietary Supplement
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
9 Years and older
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 16, 2018 · Synced Oct 7, 2026, 6:57 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Very Low Density Lipoprotein Turnover in Young and Elderly Individuals

NCT02113215
View directory record Official record
Conditions
Aging
Interventions
Stable Isotope Infusion
Procedure
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
60 Years to 75 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2013
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated May 12, 2016 · Synced Oct 7, 2026, 6:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Increased Gluconeogenesis is One Cause of Cystic Fibrosis Related Diabetes (CFRD)

NCT00082238
View directory record Official record
Conditions
Cystic Fibrosis, Diabetes Mellitus
Interventions
Stable isotopes
Other
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 45 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2005
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Mar 14, 2018 · Synced Oct 7, 2026, 6:57 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Pilot Study to Test Dietary Fat Delivery

NCT02101996
View directory record Official record
Conditions
Insulin Resistance
Interventions
high-fat diet
Other
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
30 Years to 50 Years
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Aug 19, 2016 · Synced Oct 7, 2026, 6:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin A Kinetics and Mathematical Modeling in American Women

NCT03248700
View directory record Official record
Conditions
Vitamin A Kinetics
Interventions
Vitamin A tracer
Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
19 Years to 30 Years · Female only
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2016
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 31, 2019 · Synced Oct 7, 2026, 6:57 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Muscle OXPHOS and Nutrient Homeostasis

NCT02920671
View directory record Official record
Conditions
Mitochondrial Diseases, Obesity
Interventions
Tracer-enhanced oral glucose tolerance test (OGTT*), Muscle MRI, Dual energy x-ray absorptiometry (DXA), Questionnaires
Other
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 65 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2024
U.S. locations
2
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 3, 2024 · Synced Oct 7, 2026, 6:57 AM EDT
Completed Not applicable Interventional

Protein Metabolism in Newly Diagnosed Pediatric Inflammatory Bowel Disease

NCT00586352
View directory record Official record
Conditions
Crohn's Disease, Ulcerative Colitis, Protein Metabolism
Interventions
stable isotope infusions
Other
Lead sponsor
Indiana University
Other
Eligibility
6 Years to 18 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2011
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Aug 2, 2016 · Synced Oct 7, 2026, 6:57 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Determination of Absorption and Elimination of Lamotrigine-XR

NCT00789113
View directory record Official record
Conditions
Epilepsy, Seizures, Bipolar Disorder, Bipolar Depression
Interventions
Extended Release Lamotrigine
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
65 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 20, 2016 · Synced Oct 7, 2026, 6:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Dinner Time 2: Effect of Delayed Eating or Sleeping on Metabolism

NCT04671797
View directory record Official record
Conditions
Healthy
Interventions
Early dinner, Late Dinner, Late Dinner + Late Sleep
Behavioral
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 30 Years
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 4, 2026 · Synced Oct 7, 2026, 6:57 AM EDT