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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Placebo consumption Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Understanding Effects of Calcium on the Gut-Bone Axis

NCT06383117
View directory record Official record
Conditions
Healthy, Adult, Calcium, Bone Resorption, Endocrine; Obesity
Interventions
Calcium carbonate, Placebo Control
Dietary Supplement
Lead sponsor
University of Georgia
Other
Eligibility
18 Years to 45 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Athens, Georgia
Source: ClinicalTrials.gov public record
Updated Apr 24, 2024 · Synced Sep 25, 2026, 6:44 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Short-term Effects of Caffeine and a Multi-ingredient Pre-workout on Exercise Performance

NCT07024940
View directory record Official record
Conditions
Coffee, Anthocyanins, Exercise Performance
Interventions
Ethiopian Coffee, Supplement, Water (Placebo)
Other · Dietary Supplement
Lead sponsor
St. Louis University
Other
Eligibility
18 Years to 35 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Aug 18, 2025 · Synced Sep 25, 2026, 6:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Acute and Chronic Effect of 250 mg Citicoline Consumption on Attention in Adults: A Randomized Trial

NCT05000190
View directory record Official record
Conditions
Attention
Interventions
Active capsule, Placebo capsule
Dietary Supplement · Other
Lead sponsor
PepsiCo Global R&D
Industry
Eligibility
18 Years to 60 Years
Enrollment
104 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Athens, Georgia
Source: ClinicalTrials.gov public record
Updated Nov 13, 2022 · Synced Sep 25, 2026, 6:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of Pumpkin Seed Oil Supplementation on Cardiovascular Function in Postmenopausal Women.

NCT03716960
View directory record Official record
Conditions
Elevated Blood Pressure, Hypertension
Interventions
Pumpkin Seed Oil, Placebo
Other
Lead sponsor
Marymount University
Other
Eligibility
45 Years to 65 Years · Female only
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Arlington, Virginia
Source: ClinicalTrials.gov public record
Updated Oct 23, 2018 · Synced Sep 25, 2026, 6:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Blueberries, Bananas, Exercise Recovery

NCT03445234
View directory record Official record
Conditions
Inflammatory Response, Metabolic Disturbance, Immune Suppression
Interventions
Blueberry, Placebo, banana, No banana
Dietary Supplement
Lead sponsor
Appalachian State University
Other
Eligibility
18 Years to 55 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Kannapolis, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 25, 2018 · Synced Sep 25, 2026, 6:44 AM EDT
Completed Not applicable Interventional

Effect of Probiotic Supplementation on Endothelial Function II

NCT03267758
View directory record Official record
Conditions
Cardiovascular Disease, Diabetes Mellitus, Type 2
Interventions
Goodbelly first, Placebo first
Dietary Supplement
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
40 Years to 80 Years
Enrollment
215 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2025
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 23, 2026 · Synced Sep 25, 2026, 6:44 AM EDT
Terminated Phase 4 Interventional Results available

Effect of Perioperative Intravenous Lidocaine Infusion in Robotic-Assisted Urologic Surgery

NCT03824808
View directory record Official record
Conditions
Kidney Cancer, Prostate Cancer
Interventions
Lidocaine Hydrochloride 0.8% in Dextrose 5% Solution, 0.9% Sodium Chloride Injection
Drug
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 24, 2023 · Synced Sep 25, 2026, 6:44 AM EDT
Completed Phase 2 Interventional

Impact of Grape Consumption on Brain Metabolism and Neuropsychological Performance Over 1 Year

NCT03361410
View directory record Official record
Conditions
Mild Cognitive Impairment
Interventions
Grape Powder, Placebo Powder
Dietary Supplement
Lead sponsor
University of California, Los Angeles
Other
Eligibility
65 Years to 85 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Feb 20, 2023 · Synced Sep 25, 2026, 6:44 AM EDT
Withdrawn Phase 2 Interventional

Effects of Cannabidiol on Psychiatric Symptoms, Cognition, and Cannabis Consumption in Cannabis Users With Recent-Onset Psychosis

NCT03883360
View directory record Official record
Conditions
Schizophrenia Spectrum Disorders, Cannabis Use
Interventions
Cannabidiol (CBD), Placebo
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 35 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2050
U.S. locations
3
States / cities
Los Angeles, California • Baltimore, Maryland • Catonsville, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 18, 2021 · Synced Sep 25, 2026, 6:44 AM EDT
Completed Phase 2 Interventional

Tocotrienol Against the Progression of End Stage Liver Disease

NCT02581085
View directory record Official record
Conditions
End Stage Liver Disease, NASH - Nonalcoholic Steatohepatitis, NAFLD - Nonalcoholic Fatty Liver Disease
Interventions
Tocotrienol (TCT), Placebo
Drug · Other
Lead sponsor
Chandan Sen
Other
Eligibility
18 Years and older
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2025
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Sep 7, 2026 · Synced Sep 25, 2026, 6:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

What's Hopping? Cricket Protein and Human Gut Microbiota

NCT03383341
View directory record Official record
Conditions
Healthy
Interventions
Cricket Protein Powder, Placebo control
Dietary Supplement · Other
Lead sponsor
Colorado State University
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 3, 2019 · Synced Sep 25, 2026, 6:44 AM EDT
Completed Not applicable Interventional

Effects of ISOThrive on Bodyweight, Body Composition, Hunger/Satiety and Cardiac Risk Measures in Overweight Adults

NCT02501356
View directory record Official record
Conditions
Obesity
Interventions
ISOThrive Supplement, Placebo Supplement
Dietary Supplement
Lead sponsor
Griffin Hospital
Other
Eligibility
18 Years to 75 Years
Enrollment
103 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015
U.S. locations
1
States / cities
Derby, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 25, 2020 · Synced Sep 25, 2026, 6:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Cranberry Consumption Improves γδ T Cell Function

NCT01713829
View directory record Official record
Conditions
Healthy
Interventions
Cranberry Beverage, Placebo Beverage
Other
Lead sponsor
University of Florida
Other
Eligibility
21 Years to 35 Years
Enrollment
52 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jan 13, 2014 · Synced Sep 25, 2026, 6:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Blood Flow Restriction With and Without Arginine on Physical Performance and Growth Hormone

NCT04079010
View directory record Official record
Conditions
Blood Flow Restriction, Growth Hormone, Strength Outcomes, Arginine
Interventions
BFR, Arginine, Placebo Pill
Procedure · Dietary Supplement
Lead sponsor
University of Mary Hardin-Baylor
Other
Eligibility
18 Years to 25 Years · Female only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Belton, Texas
Source: ClinicalTrials.gov public record
Updated Apr 1, 2020 · Synced Sep 25, 2026, 6:44 AM EDT
Completed Phase 4 Interventional Results available

Efficacy Study of Quetiapine Plus Topiramate for Reducing Cannabis Consumption and Bipolar Mania

NCT00393978
View directory record Official record
Conditions
Bipolar Disorder, Cannabis-Related Disorder
Interventions
Quetiapine and placebo, Quetiapine and Topiramate
Drug
Lead sponsor
University of Cincinnati
Other
Eligibility
12 Years to 21 Years
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2014
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 25, 2017 · Synced Sep 25, 2026, 6:44 AM EDT
Recruiting Phase 2Phase 3 Interventional

Alcohol Use Disorder and Cannabidiol

NCT05613608
View directory record Official record
Conditions
Alcohol Use Disorder
Interventions
Cannabidiol, Placebo
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
21 Years and older
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jun 14, 2026 · Synced Sep 25, 2026, 6:44 AM EDT
Not yet recruiting Phase 2 Interventional

NAC-REPAIR for Post-surgical Pain

NCT07227649
View directory record Official record
Conditions
Carpal Tunnel Surgery, Trigger Finger Disorder, De Quervain Syndrome, Guyon's Canal, Dupuytren Contracture, Morton Neuroma, Tarsal Tunnel Syndrome, Plantar Fasciopathy, Peroneal Nerve Entrapment
Interventions
NAC, NAC 0mg/day (Placebo)
Drug
Lead sponsor
University of Arizona
Other
Eligibility
18 Years to 75 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Jul 16, 2026 · Synced Sep 25, 2026, 6:44 AM EDT
Completed Phase 4 Interventional Results available

Dexamethasone and Pain Following Total Knee Arthroplasty

NCT02271698
View directory record Official record
Conditions
Acute Pain, Chronic Pain
Interventions
Dexamethasone, Placebo
Drug · Other
Lead sponsor
Duke University
Other
Eligibility
55 Years and older
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 19, 2018 · Synced Sep 25, 2026, 6:44 AM EDT
Completed Phase 3 Interventional Results available

A Study to Evaluate Efficacy and Safety of Gepotidacin in the Treatment of Uncomplicated Urinary Tract Infection (UTI)

NCT04020341
View directory record Official record
Conditions
Urinary Tract Infections
Interventions
Gepotidacin, Placebo matching nitrofurantoin, Nitrofurantoin, Placebo matching gepotidacin
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
12 Years and older · Female only
Enrollment
1,531 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
41
States / cities
Birmingham, Alabama • Phoenix, Arizona • Tucson, Arizona + 36 more
Source: ClinicalTrials.gov public record
Updated Jun 21, 2023 · Synced Sep 25, 2026, 6:44 AM EDT
Completed Not applicable Interventional

Blueberries for Improving Vascular Endothelial Function in Postmenopausal Women With Elevated Blood Pressure

NCT03370991
View directory record Official record
Conditions
Menopause, Elevated Blood Pressure, Hypertension, Endothelial Dysfunction
Interventions
Blueberry Powder, Placebo Powder
Dietary Supplement
Lead sponsor
Colorado State University
Other
Eligibility
45 Years to 65 Years · Female only
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Sep 13, 2022 · Synced Sep 25, 2026, 6:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Testing the Capability of the Smart Underwear Device to Detect Increased Microbiome Activity Following Lactose Consumption

NCT06724705
View directory record Official record
Conditions
Lactose Intolerance, Adult Type
Interventions
Lactose, Sucrose, Wear smart underwear
Dietary Supplement · Device
Lead sponsor
University of Maryland, College Park
Other
Eligibility
18 Years and older
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
College Park, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 30, 2026 · Synced Sep 25, 2026, 6:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Short Term Ketone Supplementation and Cardiometabolic Health

NCT04236388
View directory record Official record
Conditions
Cardiovascular Risk Factor
Interventions
Ketone drink, Placebo drink
Dietary Supplement
Lead sponsor
Virginia Polytechnic Institute and State University
Other
Eligibility
50 Years to 75 Years
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Blacksburg, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 26, 2026 · Synced Sep 25, 2026, 6:44 AM EDT
Completed Not applicable Interventional Results available

Blueberry Consumption and Type 2 Diabetes

NCT02972996
View directory record Official record
Conditions
Type2 Diabetes
Interventions
Blueberry, Placebo
Other
Lead sponsor
Albany Research Institute, Inc.
Other
Eligibility
45 Years to 75 Years · Male only
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Albany, New York
Source: ClinicalTrials.gov public record
Updated Apr 18, 2022 · Synced Sep 25, 2026, 6:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Blueberry Consumption on Gastrointestinal Health

NCT03934177
View directory record Official record
Conditions
Obesity, Circadian Dysregulation
Interventions
Blueberry powder, Placebo powder
Dietary Supplement
Lead sponsor
University of Nebraska Lincoln
Other
Eligibility
19 Years to 70 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
2
States / cities
Lincoln, Nebraska • Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Mar 21, 2023 · Synced Sep 25, 2026, 6:44 AM EDT