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Showing 1–24 of 113 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Stable Isotopes Clear all
Terminated Phase 2Phase 3 Interventional

Assessment of the Treatment of Severely Burned With Anabolic Agents on Clinical Outcomes, Recovery and Rehabilitation

NCT00675714
View directory record Official record
Conditions
Burns
Interventions
Stable Isotope Infusion Study, Collection of blood and tissues, Radiology testing: Dual-energy X-ray absorptiometry (DEXA), ultrasound, MRI, Humatrope, Ketoconazole, Oxandrolone, Propranolol, Oxandrolone and propranolol combined, Humatrope and propranolol combined, Placebo, Exercise--Hospital supervised intensive exercise program, Home exercise program
Procedure · Drug · Behavioral
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
Up to 80 Years
Enrollment
1,126 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2019
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Nov 28, 2019 · Synced Sep 6, 2026, 1:08 PM EDT
Terminated Phase 2 Interventional Results available

Study to Evaluate the Effects of MEDI6012 on Apolipoprotein B100 Metabolism

NCT03773172
View directory record Official record
Conditions
Cardiovascular Diseases
Interventions
MEDI6012, Placebo
Drug
Lead sponsor
Columbia University
Other
Eligibility
35 Years to 80 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 11, 2024 · Synced Sep 6, 2026, 1:08 PM EDT
Withdrawn Phase 1 Interventional

Dexamethasone/Pancreatic Clamp P&F

NCT06126354
View directory record Official record
Conditions
Insulin Resistance, Prediabetic State, Non-Alcoholic Fatty Liver Disease, Overweight and Obesity
Interventions
Insulin human, Octreotide Acetate, Glucagon, Human Growth Hormone, Dexamethasone Oral, [6,6-2H2] D-glucose, 20% D-glucose (aq), BOOST Plus, Harvard Apparatus PHD ULTRA CP syringe pump, Yellow Springs Instruments (YSI) 2500 Biochemistry Glucose/Lactate Analyzer, Normal saline, Human albumin
Drug · Other · Dietary Supplement + 1 more
Lead sponsor
Columbia University
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 9, 2024 · Synced Sep 6, 2026, 1:08 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 Sep 6, 2026, 1:08 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Development of a Novel Method to Study in Vivo Fatty Acid Metabolism Using Stable Isotope Labeled Fatty Acids in Humans

NCT02312492
View directory record Official record
Conditions
Dyslipidemia
Interventions
Oleic Diet, Palmitic Diet, Stearic Diet
Other
Lead sponsor
Tufts University
Other
Eligibility
50 Years to 85 Years · Female only
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 17, 2019 · Synced Sep 6, 2026, 1:08 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 Sep 6, 2026, 1:08 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Calcium Absorption in Postmenopausal Thai Women

NCT02291315
View directory record Official record
Conditions
Fractional Calcium Absorption
Interventions
Not listed
Lead sponsor
Cornell University
Other
Eligibility
53 Years to 65 Years · Female only
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007
U.S. locations
1
States / cities
Ithaca, New York
Source: ClinicalTrials.gov public record
Updated Nov 13, 2014 · Synced Sep 6, 2026, 1:08 PM EDT
Completed Phase 1 Interventional

Pancreatic Clamp in NAFLD

NCT05724134
View directory record Official record
Conditions
Insulin Resistance, Prediabetic State, Hyperinsulinemia, Non-Alcoholic Fatty Liver Disease, Obesity
Interventions
Insulin human, Octreotide Acetate, Glucagon, Growth Hormone, Human, [6,6-2H2] D-glucose, 20% D-glucose (aq), BOOST Plus, CORE Bar, Harvard Apparatus PHD ULTRA CP syringe pump, Yellow Springs Instruments (YSI) 2500 Biochemistry Glucose/Lactate Analyzer
Drug · Other · Dietary Supplement + 1 more
Lead sponsor
Columbia University
Other
Eligibility
18 Years to 65 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 11, 2026 · Synced Sep 6, 2026, 1:08 PM 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 27, 2025 · Synced Sep 6, 2026, 1:08 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

In Vivo Assessment of Cellular Metabolism in Humans

NCT02748369
View directory record Official record
Conditions
Normal Cellular Metabolism
Interventions
Somatostatin, Glucagon
Drug
Lead sponsor
K. Sreekumaran Nair
Other
Eligibility
18 Years to 45 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 2, 2022 · Synced Sep 6, 2026, 1:08 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Quantification of Human Adipogenesis

NCT01257997
View directory record Official record
Conditions
Healthy
Interventions
15N-Thymidine, 2H-Water
Biological
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 49 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2017
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 28, 2018 · Synced Sep 6, 2026, 1:08 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 Sep 6, 2026, 1:08 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Metabolic Processes in Adults and Adolescents With Autism Spectrum Disorder

NCT02733120
View directory record Official record
Conditions
Autism Spectrum Disorder
Interventions
stable isotope infusion
Other
Lead sponsor
Texas A&M University
Other
Eligibility
16 Years and older
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Sep 29, 2025 · Synced Sep 6, 2026, 1:08 PM 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 11, 2016 · Synced Sep 6, 2026, 1:08 PM EDT
Withdrawn No phase listed Observational

Glutamine Enriched Total Parenteral Feeding and Proline Metabolism in Severely Burned Patients

NCT00217035
View directory record Official record
Conditions
Burns
Interventions
TPN or TPN enriched with glutamine
Dietary Supplement
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
1997 – 2010
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 12, 2017 · Synced Sep 6, 2026, 1:08 PM 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 3, 2026 · Synced Sep 6, 2026, 1:08 PM EDT
Completed No phase listed Observational

Kinetic Biomarker for Chronic Lymphocytic Leukemia Prognosis

NCT00481858
View directory record Official record
Conditions
Chronic Lymphocytic Leukemia
Interventions
Not listed
Lead sponsor
KineMed
Industry
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2011
U.S. locations
5
States / cities
San Diego, California • Rochester, Minnesota • New Hyde Park, New York + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 27, 2011 · Synced Sep 6, 2026, 1:08 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Clearance of 25-hydroxyvitamin D in Cystic Fibrosis

NCT03104855
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
d6-25-hydroxyvitamin D3
Drug
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2023
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Oct 11, 2023 · Synced Sep 6, 2026, 1:08 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 Sep 6, 2026, 1:08 PM 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 19, 2016 · Synced Sep 6, 2026, 1:08 PM EDT
Completed No phase listed Observational

Lactate for Energy and Neurocognition

NCT05207397
View directory record Official record
Conditions
Healthy Aging, Alzheimer Disease
Interventions
Lactate infusion
Other
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
60 Years to 95 Years
Enrollment
24 participants
Timeline
2023 – 2024
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated May 13, 2025 · Synced Sep 6, 2026, 1:08 PM EDT
Completed No phase listed Observational

Study of Calcium Metabolism in Teenage Girls With Type 1 Diabetes

NCT03156179
View directory record Official record
Conditions
Diabetes Mellitus, Type 1
Interventions
calcium isotope analysis
Diagnostic Test
Lead sponsor
University of Rochester
Other
Eligibility
9 Years to 18 Years · Female only
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated May 16, 2017 · Synced Sep 6, 2026, 1:08 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Determining Cell- and Spatially-distinct Skeletal Muscle Transcriptional Aberrations in Insulin Resistance

NCT07516509
View directory record Official record
Conditions
Insulin Resistance
Interventions
VO2 Max, DEXA, Peripheral Microvascular Reactivity, Skeletal Muscle Insulin Sensitivity, Non-Oxidative Glucose Disposal, Muscle tissue Biopsy
Other
Lead sponsor
AdventHealth Translational Research Institute
Other
Eligibility
30 Years to 65 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Aug 11, 2026 · Synced Sep 6, 2026, 1:08 PM EDT
Terminated Not applicable Interventional

Metabolic Response to Infliximab in Pediatric Ulcerative Colitis

NCT00586807
View directory record Official record
Conditions
Ulcerative Colitis, Protein Metabolism, Energy Expenditure
Interventions
Stable amino acid isotopes
Other
Lead sponsor
Indiana University
Other
Eligibility
6 Years to 18 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Jan 29, 2009 · Synced Sep 6, 2026, 1:08 PM EDT