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ClinicalTrials.gov public records Last synced Oct 19, 2026, 1:05 PM EDT

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Showing 73–96 of 1,843 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Supplementation Clear all
Recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Creatine Supplementation on Cognitive Measures and Markers of Acute Kidney Injury After Exercise in the Heat

NCT07472426
View directory record Official record
Conditions
Acute Kidney Injury, Exertional Heat Illness
Interventions
Creatine Monohydrate, Maltodextrin (Placebo)
Dietary Supplement
Lead sponsor
University of Northern Iowa
Other
Eligibility
18 Years to 45 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Cedar Falls, Iowa
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced Oct 19, 2026, 1:05 PM EDT
Completed Not applicable Interventional

The Effect of NADPH Oxidase and Creatine Supplementation on Microvascular Blood Flow Regulation

NCT06018480
View directory record Official record
Conditions
Endothelial Dysfunction
Interventions
Creatine Monohydrate, Maltodextrin (Placebo)
Other
Lead sponsor
Florida State University
Other
Eligibility
18 Years to 70 Years
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated May 16, 2024 · Synced Oct 19, 2026, 1:05 PM EDT
Completed Not applicable Interventional Results available

Dietary Nitrate Supplementation and Thermoregulation

NCT03506646
View directory record Official record
Conditions
Peripheral Arterial Disease, Peripheral Artery Disease
Interventions
Placebo, Beet root juice
Dietary Supplement
Lead sponsor
University of Nebraska
Other
Eligibility
50 Years to 85 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Nov 22, 2024 · Synced Oct 19, 2026, 1:05 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Magnesium and Vitamin D Supplementation and Cardiometabolic Outcomes

NCT03134417
View directory record Official record
Conditions
Overweight and Obesity, Vitamin D Deficiency, Magnesium Deficiency, Cardiovascular Risk Factor
Interventions
Vitamin D and magnesium, Vitamin D, Placebo
Dietary Supplement
Lead sponsor
Drexel University
Other
Eligibility
30 Years to 70 Years
Enrollment
109 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2021
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 27, 2021 · Synced Oct 19, 2026, 1:05 PM EDT
Completed Not applicable Interventional Results available

Oral Zinc for the Treatment of Acute Diarrhea in US Children

NCT01198587
View directory record Official record
Conditions
Diarrhea, Gastroenteritis
Interventions
Zinc Sulfate, Placebo oral capsule
Drug
Lead sponsor
Boston Children's Hospital
Other
Eligibility
6 Months to 6 Years
Enrollment
71 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 22, 2018 · Synced Oct 19, 2026, 1:05 PM EDT
Terminated Phase 2 Interventional Results available

Alanyl-glutamine Supplementation of Standard Treatment for C. Difficile Infection

NCT02053350
View directory record Official record
Conditions
Clostridium Difficile Infection
Interventions
Alanyl-glutamine
Drug
Lead sponsor
University of Virginia
Other
Eligibility
18 Years and older
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Jun 7, 2022 · Synced Oct 19, 2026, 1:05 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Assessing the Short-Term Effects of Multi-Fiber Supplementation on Gut Health

NCT07787026
View directory record Official record
Conditions
Mixed Fiber Supplementation for Healthy Adults
Interventions
Prebiotic, Placebo
Dietary Supplement
Lead sponsor
Brown University
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Aug 26, 2026 · Synced Oct 19, 2026, 1:05 PM EDT
Completed Phase 2 Interventional Results available

Effect of a Wide Spectrum Nutritional Supplement on Mitochondrial Function in Children With Autism Spectrum Disorder

NCT03835117
View directory record Official record
Conditions
Autism Spectrum Disorder
Interventions
Wide-spectrum nutritional supplement, Placebo
Drug · Other
Lead sponsor
Rossignol Medical Center
Other
Eligibility
2 Years to 17 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Jun 30, 2026 · Synced Oct 19, 2026, 1:05 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Calorie Restriction With Leucine Supplementation

NCT01757340
View directory record Official record
Conditions
Obesity, Menopause, Osteoporosis, Sarcopenia
Interventions
Weight loss with normal protein and leucine intake, Weight loss with protein/leucine supplementation
Behavioral
Lead sponsor
Washington University School of Medicine
Other
Eligibility
50 Years to 65 Years · Female only
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2017
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 27, 2017 · Synced Oct 19, 2026, 1:05 PM EDT
Not yet recruiting Phase 2Phase 3 Interventional

Effects of Ketones on Brain Energetics and Alcohol Consumption in Alcohol Use Disorder

NCT06807918
View directory record Official record
Conditions
Alcohol Use Disorder, Ketosis
Interventions
Kenetik, magnetic resonance imaging scan, fludeoxyglucose-18 positron emission tomography scan, Alcohol bar lab, Placebo beverage
Dietary Supplement · Other
Lead sponsor
University of Pennsylvania
Other
Eligibility
21 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 15, 2026 · Synced Oct 19, 2026, 1:05 PM EDT
Recruiting Not applicable Interventional

A SkeleTal Muscle Recovery Intervention With Dietary Protein in Heart Failure

NCT05627440
View directory record Official record
Conditions
Heart Failure, Muscle Atrophy
Interventions
Ensure Max Protein, Ensure Original
Dietary Supplement
Lead sponsor
Tufts Medical Center
Other
Eligibility
18 Years to 100 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
2
States / cities
Boston, Massachusetts • Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 25, 2025 · Synced Oct 19, 2026, 1:05 PM EDT
Completed Phase 3 Interventional Results available

Selenium in Preventing Tumor Growth in Patients With Previously Resected Stage I Non-small Cell Lung Cancer

NCT00008385
View directory record Official record
Conditions
Lung Cancer
Interventions
placebo, selenium
Other · Drug
Lead sponsor
ECOG-ACRIN Cancer Research Group
Network
Eligibility
18 Years and older
Enrollment
1,772 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2019
U.S. locations
515
States / cities
Mobile, Alabama • Phoenix, Arizona • Scottsdale, Arizona + 339 more
Source: ClinicalTrials.gov public record
Updated Jul 5, 2023 · Synced Oct 19, 2026, 1:05 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

The Effect of Omega-3 Fortified Smoothies on Omega-3 Index and Physical Performance Related Outcomes Among Soldiers

NCT06462898
View directory record Official record
Conditions
Nutrition, Healthy
Interventions
Omega-3 Fortified Protein Smoothie, Non-Fortified Protein Smoothie
Dietary Supplement
Lead sponsor
Uniformed Services University of the Health Sciences
Federal
Eligibility
18 Years to 64 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
2
States / cities
Fort Campbell North, Kentucky • Fort Drum, New York
Source: ClinicalTrials.gov public record
Updated Jun 18, 2024 · Synced Oct 19, 2026, 1:05 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of a Nutritional Supplement on Metabolic Health

NCT02239198
View directory record Official record
Conditions
Cardiovascular Disease Prevention
Interventions
Nutrition bar
Other
Lead sponsor
UCSF Benioff Children's Hospital Oakland
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Oakland, California
Source: ClinicalTrials.gov public record
Updated Apr 18, 2017 · Synced Oct 19, 2026, 1:05 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Effect of Lutein, Zeaxanthin, and Meso-Zeaxanthin Supplementation on Skin Carotenoid Concentration: A Six-Month, Placebo-Controlled Crossover Study

NCT06965426
View directory record Official record
Conditions
Macular Degenerative Disease
Interventions
Lutein, Zeaxanthin, and Meso-Zeaxanthin Supplementation
Other
Lead sponsor
Insight Eyecare Specialties, Inc. dba Vision Source Eyecare,
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Sep 1, 2026 · Synced Oct 19, 2026, 1:05 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Effects of Watermelon Juice Supplementation on Postprandial Vascular Endothelial Function

NCT04092439
View directory record Official record
Conditions
Endothelial Dysfunction
Interventions
Watermelon Juice
Dietary Supplement
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 40 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Jul 30, 2024 · Synced Oct 19, 2026, 1:05 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Effect of Gamma Tocopherol Enriched Supplementation on Response to Inhaled LPS

NCT02104505
View directory record Official record
Conditions
Mild, Allergic Asthma
Interventions
Gamma Tocopherol 700 mg capsules,, Placebo
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 50 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 6, 2017 · Synced Oct 19, 2026, 1:05 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Assessment of Vitamin D Supplementation and Immune Function

NCT01399151
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D - Treatment 1, Vitamin D - Treatment 2, Vitamin D - Treatment 3
Dietary Supplement
Lead sponsor
USDA, Western Human Nutrition Research Center
Federal
Eligibility
20 Years to 49 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Apr 22, 2014 · Synced Oct 19, 2026, 1:05 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Can Amino Acid Supplementation Augment the Anabolic Response in Tendon After Exercise

NCT04067479
View directory record Official record
Conditions
Tendinopathy
Interventions
Amino Acids
Dietary Supplement
Lead sponsor
Purdue University
Other
Eligibility
21 Years to 80 Years
Enrollment
7 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Apr 11, 2023 · Synced Oct 19, 2026, 1:05 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Controlled Trial of Prenatal Vitamin D3 Supplementation to Prevent Vitamin D Deficiency in Mothers and Their Infants

NCT00610688
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Prenatal Vitamin, Cholecalciferol (Vitamin D3)
Drug
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
192 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2012
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 19, 2021 · Synced Oct 19, 2026, 1:05 PM EDT
Completed Phase 4 Interventional

A Prospective, Randomized, Open-Label, Cross-Over Study of Lokelma to Control Interdialytic Hyperkalemia

NCT05535920
View directory record Official record
Conditions
Hyperkalemia
Interventions
LOKELMA 5 GM Powder for Oral Suspension
Drug
Lead sponsor
NephroNet, Inc.
Other
Eligibility
18 Years and older
Enrollment
88 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
5
States / cities
La Jolla, California • Lawrenceville, Georgia • Fort Wayne, Indiana + 2 more
Source: ClinicalTrials.gov public record
Updated Jun 5, 2024 · Synced Oct 19, 2026, 1:05 PM EDT
Completed Phase 4 Interventional Results available

Effect of Perimenstrual Ovarian Steroid Supplementation on Perimenstrual Suicidality

NCT03720847
View directory record Official record
Conditions
Suicidal Ideation
Interventions
Estradiol Transdermal Patch 0.1 mg/24 hrs, Oral Micronized Progesterone, Inactive Clear Patch, Placebo capsule
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 4, 2019 · Synced Oct 19, 2026, 1:05 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Acute Vitamin D Supplementation on Testosterone in Females

NCT06610968
View directory record Official record
Conditions
Female Hormone Profile
Interventions
Vitamin D (Cholecalciferol ), Placebo Group
Dietary Supplement
Lead sponsor
University of Southern California
Other
Eligibility
18 Years to 35 Years · Female only
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 25, 2026 · Synced Oct 19, 2026, 1:05 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

The Effects of Daily Anti-inflammatory Supplementation on Foundation Pain Index Scores in Chronic Opiate Patients

NCT05896878
View directory record Official record
Conditions
Pain, Chronic, Opioid Dependence, Opioid Use, Inflammation Chronic
Interventions
Root.Health Dietary Supplement
Dietary Supplement
Lead sponsor
Hudson Medical
Other
Eligibility
Not listed
Enrollment
1 participant
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 13, 2025 · Synced Oct 19, 2026, 1:05 PM EDT