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Showing 1–24 of 172 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Oral glucose tolerance test Clear all
Completed No phase listed Observational

Alternate Measures of Glucose During OGTT Testing for CFRD

NCT05568134
View directory record Official record
Conditions
Cystic Fibrosis, Cystic Fibrosis-related Diabetes
Interventions
Oral glucose tolerance test
Diagnostic Test
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
10 Years and older
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 23, 2025 · Synced Sep 9, 2026, 10:09 AM EDT
Not listed Phase 3 Interventional Accepts healthy volunteers

Effects of Vitamin D and Omega-3 Supplementation on Telomeres in VITAL

NCT04386577
View directory record Official record
Conditions
Aging
Interventions
Vitamin D3 (cholecalciferol), fish oil
Dietary Supplement · Drug
Lead sponsor
Augusta University
Other
Eligibility
50 Years and older
Enrollment
1,054 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2021
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated May 12, 2020 · Synced Sep 9, 2026, 10:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Resistant Starch Type 4 on Glycemia and Insulin Sensitivity in Young Adults

NCT00687960
View directory record Official record
Conditions
Hyperglycemia
Interventions
Resistant starch type 4 - raw, Resistant Starch Type 4 - Cooked, Dextrose, Puffed Wheat
Dietary Supplement
Lead sponsor
Kansas State University
Other
Eligibility
18 Years to 35 Years
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2007
U.S. locations
1
States / cities
Manhattan, Kansas
Source: ClinicalTrials.gov public record
Updated Jun 1, 2008 · Synced Sep 9, 2026, 10:09 AM 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 9, 2026, 10:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Continuous Glucose Monitors (CGM) for Type 2 Diabetes (T2D) Risk Evaluation

NCT05404711
View directory record Official record
Conditions
Overweight and Obesity, PreDiabetes, Insulin Resistance
Interventions
CGM
Device
Lead sponsor
Mary Ellen Vajravelu, MD
Other
Eligibility
8 Years to 18 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 24, 2024 · Synced Sep 9, 2026, 10:09 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 2, 2024 · Synced Sep 9, 2026, 10:09 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Diabetes/ Endocrine Surveillance in SDS

NCT04275479
View directory record Official record
Conditions
Shwachman-Diamond Syndrome
Interventions
Oral Glucose Tolerance Test, Modified Oral Glucose Tolerance Test, Modified Mixed Meal Tolerance Test, Continuous Glucose Monitor, Food Diary, Medical History Questionnaires
Diagnostic Test · Other · Device
Lead sponsor
Washington University School of Medicine
Other
Eligibility
3 Years and older
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Aug 18, 2024 · Synced Sep 9, 2026, 10:09 AM EDT
Completed Phase 3 Interventional

US Inhaled Insulin Dose Titration Study

NCT00246623
View directory record Official record
Conditions
Diabetes Mellitus, Type 2
Interventions
Exubera (inhaled insulin), 8-point glucose diary (to assess pre- and post prandial glucoses), Meal Tolerance Test, 24-hour continuous glucose monitoring (at select sites), Pulmonary Function Testing, Hypoglycemic Event Monitoring, Laboratory Assessments, Nutritional Counseling and Diabetes Education
Drug · Procedure · Behavioral
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 80 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
16
States / cities
Birmingham, Alabama • Los Angeles, California • New Britain, Connecticut + 13 more
Source: ClinicalTrials.gov public record
Updated Feb 7, 2008 · Synced Sep 9, 2026, 10:09 AM 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 9, 2026, 10:09 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Blood Markers of Early Pancreas Cancer

NCT03568630
View directory record Official record
Conditions
Diabetes Mellitus, Type 2, PreDiabetes, Pancreas Cyst, Chronic Pancreatitis, Genetic Predisposition to Disease, Inherited Disease
Interventions
Not listed
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older
Enrollment
1,250 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2028
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Feb 1, 2026 · Synced Sep 9, 2026, 10:09 AM 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 9, 2026, 10:09 AM 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 9, 2026, 10:09 AM 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 9, 2026, 10:09 AM EDT
Completed Phase 1 Interventional

Effect of Ghrelin on Glucose Metabolism After Bariatric Surgery

NCT02953587
View directory record Official record
Conditions
Obesity
Interventions
Oral Glucose Tolerance Test (OGTT), Human Ghrelin, Saline
Procedure · Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
21 Years to 65 Years
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2023
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Feb 7, 2023 · Synced Sep 9, 2026, 10:09 AM EDT
Not yet recruiting Phase 4 Interventional Accepts healthy volunteers

Sleep Loss and Circadian Misalignment - Mechanisms of Insulin Resistance

NCT07494084
View directory record Official record
Conditions
Shift Work Schedule, Circadian Rhythm, Insulin Resistance, Circadian Misalignment
Interventions
Metyrapone And Hydrocortisone, Dextrose, insulin
Drug
Lead sponsor
Washington State University
Other
Eligibility
18 Years to 45 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Spokane, Washington
Source: ClinicalTrials.gov public record
Updated May 14, 2026 · Synced Sep 9, 2026, 10:09 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Transcriptional and Epigenetic Program of PCOS Women

NCT04034706
View directory record Official record
Conditions
PCOS
Interventions
DEXA, Magnetic Resonance (MR) Assessment of the Abdomen, MR assessment of Whole Body Fat, Adipose tissue biopsy, Oral glucose tolerance test
Other · Procedure
Lead sponsor
AdventHealth Translational Research Institute
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
108 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Mar 12, 2025 · Synced Sep 9, 2026, 10:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Sucralose and Lactisole Additions to OGTT in Humans

NCT05900193
View directory record Official record
Conditions
Neat OGTT, OGTT With Added Sucralose, OGTT With Added Lactisole
Interventions
TAS1R2/3 agonist or antagoinst admixture to oral glucose tolerance test
Dietary Supplement
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years to 70 Years
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Jun 11, 2023 · Synced Sep 9, 2026, 10:09 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

The Diabetes Prevention Trial of Type 1 Diabetes (DPT-1)

NCT00004984
View directory record Official record
Conditions
Diabetes Mellitus, Type 1
Interventions
Parenteral Insulin, Close Observation, Oral Insulin, Placebo
Drug · Other
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
3 Years to 45 Years
Enrollment
711 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1994 – 2003
U.S. locations
14
States / cities
Los Angeles, California • San Francisco, California • Stanford, California + 10 more
Source: ClinicalTrials.gov public record
Updated Apr 23, 2020 · Synced Sep 9, 2026, 10:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Simulated Passive Jogging Device on Glucose Homeostasis, Muscle Strength and Endurance

NCT03550105
View directory record Official record
Conditions
Diabetes Mellitus, Glucose Metabolism Disorders, Physical Activity
Interventions
Gentle Jogger
Device
Lead sponsor
Sackner Wellness Products LLC
Industry
Eligibility
25 Years to 80 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jan 26, 2020 · Synced Sep 9, 2026, 10:09 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

The Effect of a Peroxisome Proliferator-activated Receptor (PPAR) Alpha Agonist on Cytochrome P450 (CYP) Monooxygenase Activity in Humans

NCT00872599
View directory record Official record
Conditions
Hypertension
Interventions
fenofibrate, Placebo
Drug
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 70 Years
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 27, 2013 · Synced Sep 9, 2026, 10:09 AM 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 9, 2026, 10:09 AM EDT
Completed Phase 2 Interventional Results available

Chloroquine to Treat People With Metabolic Syndrome Aim2 (ARCH-MS)

NCT00455325
View directory record Official record
Conditions
Metabolic Syndrome X, Overweight, Hypertension, Dyslipidemias, Prediabetic State
Interventions
Placebo Comparator: First Intervention (3 weeks), Active Comparator: Second Intervention (3 weeks), Active Comparator: Third Intervention (3 weeks), Active Comparator: Fourth Intervention (3 weeks)
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 60 Years
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2012
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated May 9, 2022 · Synced Sep 9, 2026, 10:09 AM EDT
Completed No phase listed Observational

Study of Pregnancy Regulation of Insulin and Glucose

NCT02763267
View directory record Official record
Conditions
Gestational Diabetes Mellitus
Interventions
Oral glucose tolerance test
Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 44 Years · Female only
Enrollment
234 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 9, 2022 · Synced Sep 9, 2026, 10:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Comparing the Effects of Exercise on the Structure and Function of Fat Tissue

NCT05328570
View directory record Official record
Conditions
Adiposity
Interventions
Oral Glucose Tolerance Test
Diagnostic Test
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 40 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2024
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 28, 2025 · Synced Sep 9, 2026, 10:09 AM EDT