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ClinicalTrials.gov public records Last synced Oct 9, 2026, 6:36 PM EDT

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Showing 49–72 of 115 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Stable isotopes Clear all
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 5, 2019 · Synced Oct 9, 2026, 6:36 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Withdrawn No phase listed Observational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 13, 2017 · Synced Oct 9, 2026, 6:36 PM 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 9, 2026, 6:36 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Zinc Bioavailability From Amaranth-enriched Maize Tortillas

NCT02208609
View directory record Official record
Conditions
Nutritional Deficiency
Interventions
Day 1: Maize Tortillas with 20% Amaranth, Day 2 Maize Tortillas without 20% Amaranth
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Months to 36 Months
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 29, 2016 · Synced Oct 9, 2026, 6:36 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Rapid Screening Phenotype Test To Evaluate CYP 2C19 Enzyme Activity Using Stable Isotope [13C]Pantoprazole

NCT00668902
View directory record Official record
Conditions
Healthy
Interventions
[13C]Pantoprazole
Drug
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 49 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Dec 17, 2014 · Synced Oct 9, 2026, 6:36 PM 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 9, 2026, 6:36 PM EDT
Not yet recruiting Phase 1 Interventional

Human Models of Selective Insulin Resistance: Pancreatic Clamp

NCT06558422
View directory record Official record
Conditions
Insulin Resistance, Hyperinsulinemia, Metabolic Dysfunction Associated Steatotic Liver Disease, Non-Alcoholic Fatty Liver Disease, Prediabetic State, Obesity
Interventions
Insulin human, Octreotide Acetate, Glucagon, Growth Hormone, Human, 20% D-glucose (aq), [6,6-2H2] D-glucose, [1-13C1] sodium acetate, Nestle BOOST Plus, KIND Bar, Harvard Apparatus PHD ULTRA CP syringe pump, Yellow Springs Instruments (YSI) 2500 Biochemistry Glucose/Lactate Analyzer
Drug · Diagnostic Test · Dietary Supplement + 1 more
Lead sponsor
Columbia University
Other
Eligibility
18 Years to 65 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2027 – 2029
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 6, 2026 · Synced Oct 9, 2026, 6:36 PM 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 9, 2026, 6:36 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 14, 2025 · Synced Oct 9, 2026, 6:36 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 18, 2010 · Synced Oct 9, 2026, 6:36 PM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers

A Three-part Study to Determine the Safety, Tolerability and Pharmacokinetics of GSK1322322 in Healthy Volunteers and Healthy Male Japanese Subjects

NCT01818011
View directory record Official record
Conditions
Infections, Bacterial
Interventions
GSK1322322 Initial fit for purpose tablets, GSK1322322 over granulated tablets, GSK1322322 intended commercial tablets, Placebo tablets, 13C-GSK1322322 stable isotope powder, GSK1322322 for injection, Placebo injection
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 65 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Jan 15, 2019 · Synced Oct 9, 2026, 6:36 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 3, 2022 · Synced Oct 9, 2026, 6:36 PM EDT
Recruiting Not applicable Interventional

PKU Protein Requirements

NCT07194993
View directory record Official record
Conditions
PKU
Interventions
Nonradioactive stable oral isotope, Test diet
Other
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated May 14, 2026 · Synced Oct 9, 2026, 6:36 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study to Evaluate the Effect of Single Doses of LX4211 and Canagliflozin on Intestinal Glucose Absorption in Healthy Adult Subjects

NCT01916863
View directory record Official record
Conditions
Healthy Subjects
Interventions
LX4211 400 mg, canagliflozin 300 mg, LX4211 Placebo
Drug
Lead sponsor
Lexicon Pharmaceuticals
Industry
Eligibility
18 Years to 55 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2013
U.S. locations
1
States / cities
Chula Vista, California
Source: ClinicalTrials.gov public record
Updated Oct 30, 2013 · Synced Oct 9, 2026, 6:36 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 30, 2025 · Synced Oct 9, 2026, 6:36 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Does Treatment of Hypovitaminosis D Increase Calcium Absorption?

NCT00581828
View directory record Official record
Conditions
Osteoporosis, Osteopenia, Vitamin D Deficiency, Hypoparathyroidism, Hypercalciuria, Hypercalcemia
Interventions
Vitamin D
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
50 Years to 66 Years · Female only
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2008
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jul 24, 2023 · Synced Oct 9, 2026, 6:36 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 18, 2019 · Synced Oct 9, 2026, 6:36 PM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

Vitamin B6 Effects for Women Taking Birth Control Pills

NCT01128244
View directory record Official record
Conditions
Vitamin B6 Deficiency
Interventions
Vitamin B6, Infusion of labeled serine, methionine and leucine
Dietary Supplement · Procedure
Lead sponsor
University of Florida
Other
Eligibility
20 Years to 40 Years · Female only
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Feb 7, 2017 · Synced Oct 9, 2026, 6:36 PM EDT
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 9, 2026, 6:36 PM 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 9, 2026, 6:36 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

CHF COPD Sip Feed Anabolic Response

NCT02770092
View directory record Official record
Conditions
Pulmonary Disease, Chronic Obstructive, Congestive Heart Failure
Interventions
sip feeding with stable isotope infusion
Other
Lead sponsor
Texas A&M University
Other
Eligibility
45 Years and older
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Oct 1, 2025 · Synced Oct 9, 2026, 6:36 PM EDT
Completed Phase 2 Interventional

Assessment of Novel Metabolic Imaging Modalities as A Predictor Of Therapeutic EfficacyiIn Glioblastoma (GBM)

NCT06855628
View directory record Official record
Conditions
Glioma, GBM
Interventions
[6,6-²H₂]-Glucose
Other
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Sep 30, 2026 · Synced Oct 9, 2026, 6:36 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Method To Measure Protein Digestion & Absorption

NCT02065141
View directory record Official record
Conditions
Chronic Heart Failure, Pulmonary Disorder, Chronic Obstructive
Interventions
sip feeding with stable isotope infusion
Other
Lead sponsor
Texas A&M University
Other
Eligibility
20 Years and older
Enrollment
74 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2019
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Feb 7, 2022 · Synced Oct 9, 2026, 6:36 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 17, 2017 · Synced Oct 9, 2026, 6:36 PM EDT