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Showing 1–24 of 167 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Oral Glucose Tolerance Testing Clear all
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 4, 2026, 6:22 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Mixed Meal Challenge Study

NCT05087823
View directory record Official record
Conditions
Cardiovascular Diseases, Hyperlipidemias
Interventions
Lipid Challenge, Glucose Challenge, Mixed Meal Challenge
Dietary Supplement
Lead sponsor
Emory University
Other
Eligibility
18 Years to 50 Years
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Apr 30, 2023 · Synced Sep 4, 2026, 6:22 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Hot Water Immersion on Heart Rate Variability and Glucose

NCT06193291
View directory record Official record
Conditions
Glucose Tolerance, HRV
Interventions
Feet heating, Calf heating
Procedure
Lead sponsor
San Diego State University
Other
Eligibility
18 Years to 65 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Jan 7, 2024 · Synced Sep 4, 2026, 6:22 PM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Opportunistic Screening for Prediabetes and Early Diabetes in Primary Care

NCT00787839
View directory record Official record
Conditions
Type 2 Diabetes Mellitus, Prediabetic State
Interventions
Glucose challenge test, Glucose tolerance test
Other
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
18 Years and older
Enrollment
1,939 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Decatur, Georgia
Source: ClinicalTrials.gov public record
Updated Apr 26, 2015 · Synced Sep 4, 2026, 6:22 PM EDT
Withdrawn Not applicable Interventional

Use of the Insulin Pump in Cystic Fibrosis Patients With Impaired Glucose Tolerance or CFRD and in Type 1 Diabetes Patients.

NCT00287456
View directory record Official record
Conditions
Cystic Fibrosis Related Diabetes
Interventions
Insulin Pump, Insulin, Oral Glucose Tolerance Test, Whole body Protein Turnover
Device · Drug · Procedure
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
12 Years to 32 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Jan 9, 2019 · Synced Sep 4, 2026, 6:22 PM EDT
Withdrawn No phase listed Observational Accepts healthy volunteers

Epigenetic Modifications of Diabetes Mellitus Type I

NCT01623388
View directory record Official record
Conditions
Type I Diabetes
Interventions
Oral glucose tolerance test for Phase I
Procedure
Lead sponsor
Scripps Translational Science Institute
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2013
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Jan 8, 2014 · Synced Sep 4, 2026, 6:22 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Understanding the Relationship Between Inflammation and Insulin Resistance in the Adipose Tissue

NCT02378077
View directory record Official record
Conditions
Obesity, Insulin Resistance
Interventions
Fat biopsy during scheduled abdominal surgery, Fat Aspiration, Fish Oil Supplement
Procedure · Dietary Supplement
Lead sponsor
Mayo Clinic
Other
Eligibility
30 Years to 50 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2018
U.S. locations
1
States / cities
Scottsdale, Arizona
Source: ClinicalTrials.gov public record
Updated Jan 17, 2020 · Synced Sep 4, 2026, 6:22 PM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers

Role of GLP-1 in Hyperinsulinemic Hypoglycemia Post-bariatric Surgery

NCT02550145
View directory record Official record
Conditions
Hypoglycemia
Interventions
Exendin (9-39), Placebo
Drug · Other
Lead sponsor
Tracey McLaughlin
Other
Eligibility
18 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2014
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Dec 3, 2024 · Synced Sep 4, 2026, 6:22 PM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Post-Prandial Liver Glucose Metabolism in PCOS

NCT03041129
View directory record Official record
Conditions
Polycystic Ovarian Syndrome, Obesity, Hepatic Steatosis
Interventions
oral glucose tolerance test, MRI of liver
Diagnostic Test
Lead sponsor
University of Colorado, Denver
Other
Eligibility
12 Years to 21 Years · Female only
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 16, 2024 · Synced Sep 4, 2026, 6:22 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Investigation of the Ability of a Supplement to Increase Good Bacteria in the Human Intestine and Blood Sugar Levels

NCT01944904
View directory record Official record
Conditions
Pre-diabetic
Interventions
Sugar Pill, XOS 2.8
Dietary Supplement
Lead sponsor
University of California, Los Angeles
Other
Eligibility
20 Years to 70 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Feb 28, 2017 · Synced Sep 4, 2026, 6:22 PM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

GLUCOSE-MGH: Genetic Links Understood Through Challenge With Oral Semaglutide Exposure at MGH

NCT06003153
View directory record Official record
Conditions
Genetic Predisposition, Metabolic Diseases, Type 2 Diabetes
Interventions
oral semaglutide, Mixed Meal Tolerance Test (MMTT)
Drug · Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
125 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 7, 2026 · Synced Sep 4, 2026, 6:22 PM EDT
Completed Not applicable Interventional

Oral Glucose Tolerance Testing Using Candy for Cystic Fibrosis

NCT04579939
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Candy Glucose Tolerance Test
Diagnostic Test
Lead sponsor
Mayo Clinic
Other
Eligibility
10 Years to 21 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 19, 2022 · Synced Sep 4, 2026, 6:22 PM EDT
Withdrawn Phase 2Phase 3 Interventional

The Use of Nutropin Depot in HIV-infected Adult Males

NCT00286676
View directory record Official record
Conditions
HIV Infection
Interventions
Nutropin, Oral Glucose Tolerance Test, Dual Energy X-ray Absorptiometry (DEXA), Computed Tomography (CT) Scan
Drug · Procedure
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years and older · Male only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006
U.S. locations
3
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Dec 25, 2018 · Synced Sep 4, 2026, 6:22 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Snooze Control: Sleep Duration & Glucose Metabolism

NCT02583750
View directory record Official record
Conditions
Glucose Metabolism Disorders
Interventions
OGTT after deprived sleep first, OGTT after sufficient sleep first
Behavioral
Lead sponsor
Xuewen Wang
Other
Eligibility
18 Years to 25 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
1
States / cities
Columbia, South Carolina
Source: ClinicalTrials.gov public record
Updated Oct 21, 2015 · Synced Sep 4, 2026, 6:22 PM EDT
Completed No phase listed Observational

Glycemic Characterization and Pancreatic Imaging Correlates in Cystic Fibrosis

NCT03961516
View directory record Official record
Conditions
Cystic Fibrosis, Cystic Fibrosis-related Diabetes, Cystic Fibrosis Liver Disease, Pancreatic Steatosis, Hepatic Steatosis
Interventions
Frequently Sampled Oral Glucose Tolerance Test and CGM, MRI Pancreas and Liver
Device · Radiation
Lead sponsor
University Hospitals Cleveland Medical Center
Other
Eligibility
6 Years to 40 Years
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated May 19, 2022 · Synced Sep 4, 2026, 6:22 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Vitamin D Deficiency and Vitamin D Supplementation on Glucose Metabolism

NCT00749918
View directory record Official record
Conditions
Prediabetes, Vitamin D Deficiency
Interventions
Cholecalciferol (vitamin D3)
Dietary Supplement
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 65 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 19, 2008 · Synced Sep 4, 2026, 6:22 PM EDT
Completed No phase listed Observational Results available

Antihypertensive Medication Exposure as Risk for Impaired Glucose Tolerance: A PEAR Sub-Study

NCT01099397
View directory record Official record
Conditions
Prediabetic State
Interventions
Oral glucose tolerance test
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 65 Years
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Apr 2, 2018 · Synced Sep 4, 2026, 6:22 PM EDT
Completed Phase 2 Interventional Results available

Ox Bile- Conjugated Bile Acids Sodium in Type II Diabetes Mellitus

NCT02871882
View directory record Official record
Conditions
Type 2 Diabetes Mellitus, Obese, Overweight
Interventions
Gastric Emptying test, Mixed Oral Glucose Tolerance test, Conjugated bile acids sodium, Placebo
Radiation · Other · Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 70 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 30, 2023 · Synced Sep 4, 2026, 6:22 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Impact of the Metabolic Syndrome on the Incidence of Neuropathy in Obese Subjects

NCT02689661
View directory record Official record
Conditions
Metabolic Syndrome, Obesity, Neuropathy
Interventions
Not listed
Lead sponsor
Brian Callaghan
Other
Eligibility
18 Years and older
Enrollment
177 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2019
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Feb 4, 2020 · Synced Sep 4, 2026, 6:22 PM EDT
Withdrawn No phase listed Observational Accepts healthy volunteers

Oral Glucose Tolerance Testing (OGTT) on Patients Taking Somatostatin Analogs

NCT01371045
View directory record Official record
Conditions
Acromegaly
Interventions
Oral Glucose Tolerance Test (OGTT)
Other
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2019
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Feb 12, 2025 · Synced Sep 4, 2026, 6:22 PM EDT
Recruiting Early Phase 1 Interventional Accepts healthy volunteers

Glucagon-like Peptide 1, Glucose Metabolism and Gastric Bypass

NCT01803451
View directory record Official record
Conditions
Post-bariatric Surgery
Interventions
exendin -(9-39)
Drug
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
18 Years to 65 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2027
U.S. locations
2
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Sep 8, 2025 · Synced Sep 4, 2026, 6:22 PM EDT
Completed Phase 3 Interventional

Supporting Transitions to Primary Care Among Under-resourced, Postpartum Women (STEP-UP)

NCT05852054
View directory record Official record
Conditions
Gestational Diabetes Mellitus, Hypertension in Pregnancy, Dysglycemia
Interventions
OB Provider Clinical Decision Support (CDS), Patient Education (OB Visit), Text messaging, Patient Outreach, Primary Care Provider Clinical Decision Support (CDS), Patient Education (Primary Care Visit)
Behavioral
Lead sponsor
Northwestern University
Other
Eligibility
18 Years and older · Female only
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
2
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 21, 2026 · Synced Sep 4, 2026, 6:22 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Prevalence of Carbohydrate Intolerance in Lean and Overweight/Obese Children

NCT01967849
View directory record Official record
Conditions
Obesity, Type 2 Diabetes
Interventions
Oral Glucose tolerance test
Diagnostic Test
Lead sponsor
Yale University
Other
Eligibility
7 Years to 21 Years
Enrollment
2,500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1999 – 2023
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Sep 4, 2026, 6:22 PM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Mechanisms for Activation of Beige Adipose Tissue in Humans

NCT04666636
View directory record Official record
Conditions
PreDiabetes
Interventions
Placebo, Mirabegron, Mirabegron 50 MG, Mirabegron 100 mg
Drug
Lead sponsor
Philip Kern
Other
Eligibility
35 Years to 65 Years
Enrollment
65 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2027
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Jul 6, 2026 · Synced Sep 4, 2026, 6:22 PM EDT