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Showing 1–24 of 31 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: intravenous glucose tolerance test Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Modulating Glucose Tolerance With Dietary Tyrosine

NCT03872557
View directory record Official record
Conditions
Glucose Tolerance
Interventions
Tyrosine (TYR) Supplementation
Dietary Supplement
Lead sponsor
Columbia University
Other
Eligibility
18 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 4, 2021 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Phase 4 Interventional Results available

Reducing Risk of Type 2 Diabetes: Hydroxychloroquine Use in Pre-Diabetes

NCT01326533
View directory record Official record
Conditions
Pre-diabetes
Interventions
hydroxychloroquine, Placebo
Drug · Other
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 85 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 25, 2016 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Phase 4 Interventional Results available

The Study of Exenatide Action on Vessel Function in Type 2 Diabetes and Prediabetes

NCT01181986
View directory record Official record
Conditions
Type 2 Diabetes Mellitus
Interventions
Exenatide SC, Exenatide IV, Placebo SC, Exendin-9, Placebo IV
Drug
Lead sponsor
Carl T. Hayden VA Medical Center
Federal
Eligibility
35 Years to 70 Years
Enrollment
76 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated May 19, 2014 · Synced Sep 25, 2026, 10:22 PM EDT
Suspended Not applicable Interventional

Insulin Sensitivity in Men With the Metabolic Syndrome

NCT00433173
View directory record Official record
Conditions
Metabolic Syndrome
Interventions
intravenous glucose tolerance test, testosterone, anastrozole, goserelin acetate implant, aerobic capacity (VO2 Max), MRI, muscle biopsy, measurement of resting metabolic rate (energy expenditure), Dual energy x-ray absorptiometry, Fasting oral glucose tolerance test
Procedure · Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
50 Years to 75 Years · Male only
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2011
U.S. locations
2
States / cities
Baltimore, Maryland • Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 1, 2010 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Sympathetic Activation in Obesity

NCT04946552
View directory record Official record
Conditions
Obesity, Healthy
Interventions
PET Scan, Mixed Meal Test, Muscle sympathetic nerve activity (MSNA), Oral Glucose Tolerance Test, Body Composition, Percent Body Fat & Percent Body Water (Tanita scale), CT Scan, Body Composition, Percent Body Fat & Percent Body Water (DXA Scan)
Diagnostic Test · Dietary Supplement · Other
Lead sponsor
Yale University
Other
Eligibility
18 Years to 45 Years
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 15, 2024 · Synced Sep 25, 2026, 10:22 PM EDT
Terminated Not applicable Interventional

Insulin Differences Between African-American and Caucasian Female Adolescents With Polycystic Ovary Syndrome (PCOS)

NCT02052479
View directory record Official record
Conditions
Polycystic Ovary Syndrome, PCOS
Interventions
Frequently Sampled Intravenous Glucose Tolerance Test (FSIVGTT)
Other
Lead sponsor
Nationwide Children's Hospital
Other
Eligibility
12 Years to 18 Years · Female only
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 6, 2019 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Phase 2 Interventional Results available

Treating Nonalcoholic Steatohepatitis (NASH) With Metformin

NCT00063232
View directory record Official record
Conditions
Hepatitis
Interventions
Metformin
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2008
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 19, 2011 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

AchE Inhibitor and Insulin

NCT03063515
View directory record Official record
Conditions
Diabetes Mellitus
Interventions
Pyridostigmine
Drug
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Feb 26, 2019 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Phase 1 Interventional

Study of the Acute Metabolic Effect of Exenatide in Type 1 Diabetes

NCT01855490
View directory record Official record
Conditions
Type 1 Diabetes
Interventions
Exenatide
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 56 Years
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jul 6, 2016 · Synced Sep 25, 2026, 10:22 PM EDT
Completed No phase listed Observational

Metabolomics of Roux-en-Y Gastric Bypass (RYGB) With Gastrostomy

NCT00887302
View directory record Official record
Conditions
Type II Diabetes Mellitus, Obesity
Interventions
Gastric Band, Gastric Sleeve, Gastrostomy Tube
Procedure
Lead sponsor
East Carolina University
Other
Eligibility
18 Years to 60 Years · Female only
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Greenville, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 5, 2023 · Synced Sep 25, 2026, 10:22 PM EDT
Withdrawn Phase 1 Interventional Accepts healthy volunteers

Effects of Xenin-25 on Insulin Secretion and Gastric Emptying in Humans With and Without a Complete Truncal Vagotomy

NCT01951716
View directory record Official record
Conditions
Does the Vagus Nerve Mediate the Effects of Xenin-25
Interventions
Graded Glucose Infusion with Placebo, Graded Glucose Infusion with GIP Alone, Graded Glucose Infusion with xenin-25 alone, Graded Glucose Infusion with GIP plus xenin-25, Meal Tolerance Test with Placebo, Meal Tolerance Test with xenin-25
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 70 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 25, 2018 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Insulin Resistance in Adolescents

NCT04089332
View directory record Official record
Conditions
Insulin Resistance
Interventions
Oral Glucose Tolerance Test (OGTT), 3 Tesla MRI, Intravenous Catheter, Cognitive Tests
Other · Device
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
12 Years to 18 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Sep 4, 2024 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Evaluation of Kisspeptin Glucose-Stimulated Insulin Secretion With Oral Glucose Tolerance Test

NCT04958109
View directory record Official record
Conditions
Metabolic Diseases
Interventions
Oral Glucose Tolerance Test, Kisspeptin, Placebo
Diagnostic Test · Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 5, 2026 · Synced Sep 25, 2026, 10:22 PM EDT
Withdrawn Phase 4 Interventional Accepts healthy volunteers

Effect of Fasting Free Fatty Acids and Fasting Glucose on 1st and 2nd Phase Insulin Secretion

NCT03998709
View directory record Official record
Conditions
Healthy
Interventions
Somatostatin, Dextrose, Insulin, Intralipid
Drug · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
25 Years to 65 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 8, 2022 · Synced Sep 25, 2026, 10:22 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Routine Validation and Reproducibility Testing of Laboratory Assays and Research Techniques Used for Endocrine, Cardiometabolic, and Musculoskeletal Disorder Research (VALD)

NCT07083557
View directory record Official record
Conditions
Obesity and Obesity-related Medical Conditions, Diabetes, Atherosclerotic Disease, Heart Failure, MASH, Sarcopenia, Osteoporosis, Hyperparathyroidism, Hypoparathyroidism, Ischemic Heart Disease, Cystic Fibrosis (CF), Chronic Kidney Disease(CKD), Osteopenia, Cachexia
Interventions
Endothelial cell collection
Other
Lead sponsor
Bettina Mittendorfer
Other
Eligibility
18 Years to 100 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2027 – 2030
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated May 6, 2026 · Synced Sep 25, 2026, 10:22 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Routine Validation and Reproducibility Testing of Laboratory Measures and Research Techniques Used for Metabolism Research (VAL)

NCT06286761
View directory record Official record
Conditions
Obesity
Interventions
endothelial cell collection
Other
Lead sponsor
Bettina Mittendorfer
Other
Eligibility
18 Years to 75 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Aug 3, 2026 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Arginine Metabolism in Youth With Type 2 Diabetes

NCT05477134
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Stable isotope infusion, oral glucose ingestion, intravenous arginine bolus
Other
Lead sponsor
Baylor College of Medicine
Other
Eligibility
12 Years to 20 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 12, 2026 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Cognition and Magnetic Resonance Imaging of Brain Inflammation in Obesity

NCT04116229
View directory record Official record
Conditions
Obesity
Interventions
Oral glucose tolerance test, Cognitive testing, Magnetic resonance imaging
Procedure · Behavioral
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 75 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 9, 2023 · Synced Sep 25, 2026, 10:22 PM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers Results available

Pharmacogenomics of GLP1 Receptor Agonists

NCT05762744
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Exenatide Injection (before the first FSIGT), Exenatide injection before the second FSIGT)
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years and older
Enrollment
63 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2022
U.S. locations
1
States / cities
Lancaster, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 30, 2025 · Synced Sep 25, 2026, 10:22 PM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

NAUTICAL: Effect of Natriuretic Peptide Augmentation on Cardiometabolic Health in Black Individuals

NCT04055428
View directory record Official record
Conditions
Diabetes Mellitus, Cardiovascular Diseases, Insulin Sensitivity/Resistance, Metabolic Disease, Natriuretic Peptides, Metabolism, Energy Expenditure
Interventions
Sacubitril, Valsartan 97-103 mg Oral Tablet, Valsartan 160 mg, Intravenous Glucose Tolerance Test, Standardized Meals, Exercise capacity VO2 maximum determination
Drug · Other · Dietary Supplement
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2027
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jul 27, 2026 · Synced Sep 25, 2026, 10:22 PM EDT
Completed No phase listed Observational

Use of a Test That Evaluates How the Body Handles Insulin and Glucose

NCT00027092
View directory record Official record
Conditions
HIV Infections
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older · Male only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
8
States / cities
Los Angeles, California • San Francisco, California • Honolulu, Hawaii + 3 more
Source: ClinicalTrials.gov public record
Updated Aug 6, 2008 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Mechanisms of Cerebrovascular Control

NCT02936687
View directory record Official record
Conditions
Metabolic Syndrome X
Interventions
NOS Inhibition, ET-1 Inhibition, NOS Inhibition Placebo, 3 Tesla MRI, Intravenous Catheter, Oral Glucose Tolerance Test, ET-1 Inhibition Placebo
Drug · Device · Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 45 Years
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 17, 2021 · Synced Sep 25, 2026, 10:22 PM EDT
Completed Not applicable Interventional Results available

Role of Glucagon-Like Peptide-1 in Postprandial Hypoglycemia

NCT01162499
View directory record Official record
Conditions
Postprandial Hypoglycemia
Interventions
Exendin-(9-39), Vehicle
Drug · Other
Lead sponsor
Diva De Leon
Other
Eligibility
6 Months to 18 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 22, 2017 · Synced Sep 25, 2026, 10:22 PM EDT
Completed No phase listed Observational

Pathogenesis of Youth Onset Type 2 Diabetes and Prediabetes

NCT03195400
View directory record Official record
Conditions
IGT - Impaired Glucose Tolerance, T2D
Interventions
Oral Glucose Tolerance Test, Hyperglycemic Clamp, Isoglycemic Intravenous Glucose Test, Hyperinsulinemic Euglycemic Clamp and 2H20
Diagnostic Test
Lead sponsor
Yale University
Other
Eligibility
12 Years to 18 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 22, 2023 · Synced Sep 25, 2026, 10:22 PM EDT