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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Completed Phase 1 Interventional

Efficacy Study of Oral Arginine to Improve Immune Function in Glioblastoma Multiforme

NCT02017249
View directory record Official record
Conditions
Glioblastoma Multiforme
Interventions
arginine in powder form, Silica and cellulose placebo powder
Drug
Lead sponsor
Inova Health Care Services
Other
Eligibility
18 Years and older
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Fairfax, Virginia
Source: ClinicalTrials.gov public record
Updated Sep 15, 2019 · Synced Sep 9, 2026, 10:22 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

The Effects of Sildenafil on Exercise Function and Capacity in Patients With Fontan Circulation

NCT00964782
View directory record Official record
Conditions
Fontan Circulation
Interventions
Sildenafil, Placebo, Sildenafil 2, Placebo 2
Drug
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
6 Years to 17 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 25, 2019 · Synced Sep 9, 2026, 10:22 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Gut-brain Axis in Food Reward and Alcohol Consumption

NCT01902069
View directory record Official record
Conditions
Impulsivity, Alcohol Consumption
Interventions
Phospholean, Placebo
Dietary Supplement
Lead sponsor
Yale University
Other
Eligibility
21 Years to 45 Years
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 2, 2020 · Synced Sep 9, 2026, 10:22 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Vitamin D Intervention and Associated Changes in the Gut Microbiome and Vitamin D Levels in Healthy Adults

NCT05387876
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Vitamin D intervention, Placebo intervention
Dietary Supplement
Lead sponsor
Baylor University
Other
Eligibility
18 Years to 79 Years
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Waco, Texas
Source: ClinicalTrials.gov public record
Updated May 23, 2022 · Synced Sep 9, 2026, 10:22 AM EDT
Completed Phase 1Phase 2 Interventional

Acute Nicotine Gum and Tinnitus Loudness in Non-Smoking Adults

NCT07772089
View directory record Official record
Conditions
Tinnitus, Chronic Subjective Tinnitus
Interventions
Nicotine polacrilex gum 4 mg, Placebo gum
Drug · Other
Lead sponsor
San Diego State University
Other
Eligibility
18 Years to 80 Years
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Sep 3, 2026 · Synced Sep 9, 2026, 10:22 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers Results available

Safety and Pharmacokinetics of an Extract of Naringenin

NCT03582553
View directory record Official record
Conditions
Safety Issues, Pharmacokinetics
Interventions
Naringenin, Placebo
Dietary Supplement · Other
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Jan 17, 2020 · Synced Sep 9, 2026, 10:22 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Vitamin D Versus Placebo in the Treatment of Vague Musculoskeletal Pain in Children

NCT00944606
View directory record Official record
Conditions
Hypovitaminosis D
Interventions
Vitamin D, Placebo candy
Dietary Supplement · Other
Lead sponsor
University of New Mexico
Other
Eligibility
5 Years to 14 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Feb 29, 2012 · Synced Sep 9, 2026, 10:22 AM EDT
Terminated Phase 4 Interventional

Oral Vancomycin for Preventing Clostridium Difficile Recurrence

NCT03200093
View directory record Official record
Conditions
Clostridium Difficile Infection
Interventions
Oral Vancomycin, Placebo
Drug
Lead sponsor
Rochester General Hospital
Other
Eligibility
18 Years and older
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Apr 25, 2021 · Synced Sep 9, 2026, 10:22 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Interactions of Human Gut Microbiota With Intestinal Sweet Taste Receptors

NCT03032640
View directory record Official record
Conditions
Obesity
Interventions
Oral Glucose Tolerance Test (OGTT), Assessment of dietary compliance, Stool sampling, Sodium Saccharin, Placebo, Lactisole
Other
Lead sponsor
AdventHealth Translational Research Institute
Other
Eligibility
18 Years to 45 Years
Enrollment
102 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Feb 1, 2023 · Synced Sep 9, 2026, 10:22 AM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Treatment to Regress to Normoglycemia in Women with a Recent History of GDM

NCT04873050
View directory record Official record
Conditions
Pre Diabetes, Postpartum Disorder
Interventions
Semaglutide Pen Injector [Ozempic], Placebo semaglutide pen injector
Drug
Lead sponsor
Woman's
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
102 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Mar 12, 2025 · Synced Sep 9, 2026, 10:22 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Using Nicotine to Reverse Age-related Auditory Processing Deficits

NCT04971954
View directory record Official record
Conditions
Auditory Perceptual Impairment, Aging
Interventions
Nicotine gum, Placebo gum
Other
Lead sponsor
University of California, Irvine
Other
Eligibility
18 Years to 85 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Irvine, California
Source: ClinicalTrials.gov public record
Updated Aug 9, 2026 · Synced Sep 9, 2026, 10:22 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Probiotics on Health-related Quality of Life in College Students With Upper Respiratory Infections

NCT01657643
View directory record Official record
Conditions
Upper Respiratory Infection
Interventions
Probiotics, placebo
Dietary Supplement
Lead sponsor
University of Medicine and Dentistry of New Jersey
Other
Eligibility
18 Years to 25 Years
Enrollment
231 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011
U.S. locations
1
States / cities
Framingham, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 27, 2015 · Synced Sep 9, 2026, 10:22 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Dietary Green Tea Confection For Resolving Gut Permeability-Induced Metabolic Endotoxemia In Obese Adults

NCT03413735
View directory record Official record
Conditions
Obesity, Endotoxemia, Inflammation
Interventions
Green Tea Extract, Placebo
Other
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 50 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 12, 2025 · Synced Sep 9, 2026, 10:22 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers

Safety, Tolerability and Efficacy of the Nicotine Patch and Gum for the Treatment of Adolescent Tobacco Dependence

NCT01208935
View directory record Official record
Conditions
Tobacco Dependence
Interventions
Nicotine Patch, Nicotine Gum
Drug
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
13 Years to 17 Years
Enrollment
157 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1999 – 2004
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 11, 2017 · Synced Sep 9, 2026, 10:22 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Prebiotic Effects of Isomalto-oligosaccharide

NCT02433873
View directory record Official record
Conditions
Microbiota
Interventions
Isomalto-oligosaccharide
Dietary Supplement
Lead sponsor
George Mason University
Other
Eligibility
18 Years to 45 Years
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Fairfax, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 22, 2017 · Synced Sep 9, 2026, 10:22 AM EDT
Not yet recruiting Phase 1 Interventional

Impact of Sweeteners on the Addictive Threshold of Nicotine

NCT07771725
View directory record Official record
Conditions
Smoking ( Cigarette)
Interventions
Nicotine 0.05 mg/pulse and 0.1 mg/pulse, Saline Placebo (0.5mL injection), sucralose, Sugar syrup (Placebo)
Drug · Dietary Supplement
Lead sponsor
Yale University
Other
Eligibility
21 Years to 59 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 30, 2026 · Synced Sep 9, 2026, 10:22 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Nutrition Interventions to Support the Immune System in Response to Stress

NCT02053506
View directory record Official record
Conditions
Mitigation of Immune Function Decrements in Response to Stress
Interventions
Immune-enhancing nutritional beverage, Probiotics (BB-12), Placebo (for nutritional beverage and probiotic)
Dietary Supplement
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
18 Years to 45 Years
Enrollment
63 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 1, 2017 · Synced Sep 9, 2026, 10:22 AM EDT
Completed Early Phase 1 Interventional

Phosphate Binding of Chitosan Chewing Gum in Patients With Chronic Kidney Disease (CKD)

NCT01341691
View directory record Official record
Conditions
Chronic Kidney Disease
Interventions
chewing gum
Other
Lead sponsor
Denver Nephrologists, P.C.
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 25, 2011 · Synced Sep 9, 2026, 10:22 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluating the Impact of Different Sugar Replacer Combinations on Gastrointestinal Tolerance

NCT05794100
View directory record Official record
Conditions
Tolerance, Healthy Population
Interventions
Acute intake of one of the products (active comparator 1 to 9) or Placebo comparator
Other
Lead sponsor
Mondelēz International, Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Addison, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 2, 2023 · Synced Sep 9, 2026, 10:22 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Sweet Scents to Sweet Dreams

NCT06247696
View directory record Official record
Conditions
Sleep Disturbance, Mental Health Issue
Interventions
Herbal Pillows
Other
Lead sponsor
Duquesne University
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 16, 2026 · Synced Sep 9, 2026, 10:22 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Dihydrocapsiate on Energy Expenditure in Women

NCT01773356
View directory record Official record
Conditions
Obesity
Interventions
Dihydrocapsiate
Dietary Supplement
Lead sponsor
Ellen Evans
Other
Eligibility
25 Years to 45 Years · Female only
Enrollment
126 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Athens, Georgia
Source: ClinicalTrials.gov public record
Updated Sep 24, 2015 · Synced Sep 9, 2026, 10:22 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Cardiometabolic Effects of Sweet Cherry Juice

NCT03948061
View directory record Official record
Conditions
Obesity, Metabolic Syndrome
Interventions
Cherry juice, Placebo beverage
Other
Lead sponsor
USDA, Western Human Nutrition Research Center
Federal
Eligibility
20 Years to 65 Years
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Oct 26, 2023 · Synced Sep 9, 2026, 10:22 AM EDT
Active, not recruiting Phase 1 Interventional Accepts healthy volunteers

The Use of Functional Confections in Promoting Oral Health

NCT01514552
View directory record Official record
Conditions
Oral Health, Oral Cancer, Gum Disease
Interventions
Strawberry gummy, Placebo control gummy
Other
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 70 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2026
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 19, 2025 · Synced Sep 9, 2026, 10:22 AM EDT
Completed Not applicable Interventional

Effects of Miracle Fruit Pill Application on Food Likings and Energy Intake in Diabetic or Prediabetic Patients

NCT05468411
View directory record Official record
Conditions
Diabetes, PreDiabetes
Interventions
Oral application of miracle fruit pill, Oral application of sugar candy
Other
Lead sponsor
Queens College, The City University of New York
Other
Eligibility
45 Years to 75 Years
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Bayside, New York
Source: ClinicalTrials.gov public record
Updated Sep 14, 2022 · Synced Sep 9, 2026, 10:22 AM EDT