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

Evaluating the Effects of a Synbiotic Versus Probiotic or Placebo on Gut Microbiota and Cardiometabolic Health: A Randomized Double-Blind Placebo Controlled Trial

NCT06544915
View directory record Official record
Conditions
Blood Pressure, Body Composition, Immune Function
Interventions
Synbiotic, Probiotic, Placebo
Dietary Supplement
Lead sponsor
Skidmore College
Other
Eligibility
18 Years to 60 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Saratoga Springs, New York
Source: ClinicalTrials.gov public record
Updated Aug 8, 2024 · Synced Sep 25, 2026, 11:54 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of Acute Alcohol Intoxication on Neural Processes During Decisions to Engage in HIV Risk Behaviors

NCT04360018
View directory record Official record
Conditions
Alcohol Consumption
Interventions
Alcohol beverage, Placebo beverage
Other
Lead sponsor
National Institute on Alcohol Abuse and Alcoholism (NIAAA)
NIH
Eligibility
21 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 31, 2026 · Synced Sep 25, 2026, 11:54 PM EDT
Completed Not applicable Interventional Results available

Glutamine and Insulin Sensitivity in Type I Diabetes

NCT01467063
View directory record Official record
Conditions
Type I Diabetes Mellitus
Interventions
Glutamine, Placebo
Dietary Supplement
Lead sponsor
Nemours Children's Clinic
Other
Eligibility
13 Years to 19 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Jul 13, 2021 · Synced Sep 25, 2026, 11:54 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Measuring the Influence of Kefir on Children's Stools on Antibiotics (MILK)

NCT00481507
View directory record Official record
Conditions
Respiratory Tract Infections
Interventions
Kefir, Placebo
Other
Lead sponsor
Georgetown University
Other
Eligibility
1 Year to 5 Years
Enrollment
125 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Jul 9, 2019 · Synced Sep 25, 2026, 11:54 PM EDT
Completed Not applicable Interventional

Impact of Resistance Training-Protein Supplementation on Lean Muscle Mass in Childhood Cancer Survivors

NCT02501460
View directory record Official record
Conditions
Cancer
Interventions
Educational handouts, Resistance training, Supplementation, Placebo
Other · Dietary Supplement
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
18 Years to 44 Years
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 16, 2018 · Synced Sep 25, 2026, 11:54 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Kudzu Treatment for Alcohol Abuse

NCT01596231
View directory record Official record
Conditions
Alcohol Consumption
Interventions
Kudzu, Placebo
Dietary Supplement
Lead sponsor
Mclean Hospital
Other
Eligibility
21 Years to 40 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
Belmont, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 20, 2014 · Synced Sep 25, 2026, 11:54 PM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Effects of Energy Drinks on Cardiovascular Endpoints

NCT07212803
View directory record Official record
Conditions
Healthy Volunteers, Safety After Oral Intake
Interventions
Energy Drink A + Placebo Capsule, Placebo Drink + Moxifloxacin Capsule, Placebo Drink + Caffeine Capsule, Placebo Drink + Placebo Capsule, Energy Drink B, Control Product + Taurine, Control Product + Caffeine + Taurine, Lower Dose Energy Drink A
Dietary Supplement · Drug · Other
Lead sponsor
University of the Pacific
Other
Eligibility
18 Years to 40 Years
Enrollment
3 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Stockton, California
Source: ClinicalTrials.gov public record
Updated Nov 25, 2025 · Synced Sep 25, 2026, 11:54 PM EDT
Terminated Phase 4 Interventional

Patiromer Utility as an Adjunct Treatment in Patients Needing Urgent Hyperkalemia Management

NCT04443608
View directory record Official record
Conditions
Hyperkalemia
Interventions
Patiromer Powder for Oral Suspension [Veltassa], Placebo
Drug
Lead sponsor
Comprehensive Research Associates
Industry
Eligibility
18 Years and older
Enrollment
115 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
19
States / cities
Stanford, California • New Haven, Connecticut • Newark, Delaware + 13 more
Source: ClinicalTrials.gov public record
Updated Aug 30, 2023 · Synced Sep 25, 2026, 11:54 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Exercise Fatiguability in Older Adults: The Protective Effects of Dietary Nitrate Supplementation

NCT05313490
View directory record Official record
Conditions
Aging
Interventions
Beetroot Juice, Placebo Beetroot Juice
Dietary Supplement · Other
Lead sponsor
Marquette University
Other
Eligibility
60 Years to 90 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Aug 23, 2022 · Synced Sep 25, 2026, 11:54 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Acute Strawberry Intake on Endothelial Function

NCT03596008
View directory record Official record
Conditions
Healthy
Interventions
Active drink, Placebo drink
Dietary Supplement
Lead sponsor
Clinical Nutrition Research Center, Illinois Institute of Technology
Industry
Eligibility
18 Years to 45 Years
Enrollment
7 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 26, 2021 · Synced Sep 25, 2026, 11:54 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Acceptability and Tolerability of Ketone Supplements and Effects of BHB Concentrations in Young Adults

NCT05390385
View directory record Official record
Conditions
Exogenous Ketosis
Interventions
KE1 5g, KE1 10g, KE4 5g, KE 10g, Placebo drink
Dietary Supplement · Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 25 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 15, 2023 · Synced Sep 25, 2026, 11:54 PM EDT
Completed Early Phase 1 Interventional

Nitrate Supplementation and Cerebrovascular and Cognitive Function in Metabolic Syndrome

NCT05532423
View directory record Official record
Conditions
Metabolic Syndrome
Interventions
Beetroot Juice - Active, beetroot juice - Placebo
Drug
Lead sponsor
Penn State University
Other
Eligibility
55 Years to 75 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 5, 2025 · Synced Sep 25, 2026, 11:54 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Better Than Study: Targeting Heavy Alcohol Use With Naltrexone Among Men Who Have Sex With Men (MSM)

NCT02330419
View directory record Official record
Conditions
Binge Drinking, HIV
Interventions
Placebo, Naltrexone, Medical Management (MM) counseling for alcohol use:, Urinalysis for novel alcohol biochemical markers:, Behavioral survey measurements:, Dried Blood Spot (DSB) Testing for Phosphatidylethanol, Ecological Momentary Assessment
Drug · Behavioral · Diagnostic Test
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 70 Years · Male only
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2021
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Apr 19, 2025 · Synced Sep 25, 2026, 11:54 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Effect of Elderberry Juice on Cognition and Inflammation in Patients With Mild Cognitive Impairment

NCT02414607
View directory record Official record
Conditions
Mild Cognitive Impairment
Interventions
Elderberry Juice, Placebo
Biological · Other
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
50 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 22, 2022 · Synced Sep 25, 2026, 11:54 PM EDT
Completed Not applicable Interventional

Strength Testing After Nitrate Delivery (STAND) in ICU Patients

NCT02293616
View directory record Official record
Conditions
Respiratory Failure
Interventions
Nitrate Rich Beetroot Juice, Placebo
Dietary Supplement
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
56 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 17, 2018 · Synced Sep 25, 2026, 11:54 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Effects of Leucine on Body Weight

NCT00683826
View directory record Official record
Conditions
Overweight, Obesity
Interventions
L-Leucine 8gr, Liquid meal, L-Leucine 4g
Dietary Supplement · Other
Lead sponsor
Columbia University
Other
Eligibility
18 Years to 65 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2010
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 4, 2013 · Synced Sep 25, 2026, 11:54 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Assessing Fermentability of a Dietary Fiber

NCT01497249
View directory record Official record
Conditions
Nutritional Intervention
Interventions
A dietary fiber (FCHO), Placebo
Dietary Supplement
Lead sponsor
Clinical Nutrition Research Center, Illinois Institute of Technology
Industry
Eligibility
18 Years to 65 Years
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 26, 2021 · Synced Sep 25, 2026, 11:54 PM EDT
Completed Phase 2 Interventional Results available

A Study Investigating Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of GSK2330672 Administered With Metformin to Type 2 Diabetes Patients

NCT02202161
View directory record Official record
Conditions
Diabetes Mellitus, Type 2
Interventions
GSK2330672, Placebo, Sitagliptin, Metformin
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
30 Years to 64 Years
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
4
States / cities
Chula Vista, California • Miami, Florida • Baltimore, Maryland + 1 more
Source: ClinicalTrials.gov public record
Updated Nov 5, 2017 · Synced Sep 25, 2026, 11:54 PM EDT
Enrolling by invitation Phase 2Phase 3 Interventional

Effects of Ketone Supplementation on Acute Alcohol Withdrawal

NCT06173973
View directory record Official record
Conditions
Alcohol Use Disorder, Alcohol Withdrawal, Alcohol Dependence, Ketosis
Interventions
Kenetik; Ketone Concentrate, Isocaloric dextrose placebo
Dietary Supplement
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 75 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
2
States / cities
Philadelphia, Pennsylvania • Wernersville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 5, 2026 · Synced Sep 25, 2026, 11:54 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Energy Drink Effects on Performance, Mood, and Cardiovascular Outcomes

NCT05559372
View directory record Official record
Conditions
Caffeine, Exercise Performance, Energy Drink, Cardiovascular Safety, Mood
Interventions
Acute energy drink or placebo consumption
Dietary Supplement
Lead sponsor
Nathaniel Jenkins
Other
Eligibility
20 Years to 35 Years · Male only
Enrollment
109 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated May 31, 2023 · Synced Sep 25, 2026, 11:54 PM EDT
Completed Not applicable Interventional

Effect of Beet Juice Supplementation on Vascular and Inspiratory Muscle Function

NCT04920799
View directory record Official record
Conditions
Coronary Artery Disease
Interventions
Nitrate rich beetroot juice, Nitrate depleted beetroot juice
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
60 Years to 85 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated May 13, 2026 · Synced Sep 25, 2026, 11:54 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Determining the Ergogenic Effects of Carb10™ Supplementation on Carbohydrate-Rich and Carbohydrate-Restricted Diets

NCT03231514
View directory record Official record
Conditions
Ketogenic Dieting
Interventions
Carbohydrate Supplement (Carb10), Diet, Exercise
Dietary Supplement · Other
Lead sponsor
Texas Woman's University
Other
Eligibility
18 Years to 30 Years
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Denton, Texas
Source: ClinicalTrials.gov public record
Updated Feb 19, 2018 · Synced Sep 25, 2026, 11:54 PM EDT
Recruiting Phase 3 Interventional

Improving Mobility After Revascularization in Peripheral Artery Disease

NCT06686121
View directory record Official record
Conditions
Peripheral Artery Disease, Intermittent Claudication, Peripheral Vascular Disease, Mobility Limitation, Revascularization
Interventions
Home Based Exercise, Nitrate Rich Beetroot Juice, Attention Control, Placebo Beetroot Juice Without Nitrate
Behavioral · Drug
Lead sponsor
Northwestern University
Other
Eligibility
18 Years and older
Enrollment
386 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2032
U.S. locations
7
States / cities
Tucson, Arizona • Downey, California • Atlanta, Georgia + 3 more
Source: ClinicalTrials.gov public record
Updated Aug 25, 2025 · Synced Sep 25, 2026, 11:54 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Metabolomic Impacts of Branched-chain Amino Acid Supplementation During Endurance Exercise

NCT04969536
View directory record Official record
Conditions
Healthy
Interventions
Branched Chain Amino Acids, Placebo
Dietary Supplement · Other
Lead sponsor
Montana State University
Other
Eligibility
18 Years to 55 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Bozeman, Montana
Source: ClinicalTrials.gov public record
Updated May 2, 2023 · Synced Sep 25, 2026, 11:54 PM EDT