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ClinicalTrials.gov public records Last synced Oct 6, 2026, 1:06 AM EDT

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Showing 73–96 of 310 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Oral placebo supplement Clear all
Terminated Not applicable Interventional

A Pilot Trial of Curcumin Effects on Cognition in Schizophrenia

NCT02476708
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder
Interventions
curcumin 1800mg, Placebo
Dietary Supplement
Lead sponsor
Yale University
Other
Eligibility
18 Years to 65 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jan 23, 2018 · Synced Oct 6, 2026, 1:06 AM EDT
Completed Not applicable Interventional

The Effect of Vitamin D Supplementation on Glucose Metabolism in Non-Diabetic African American Adults

NCT01141192
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
vitamin D3, cholecalciferol, Inactive comparator
Dietary Supplement
Lead sponsor
Augusta University
Other
Eligibility
19 Years to 60 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Jun 10, 2010 · Synced Oct 6, 2026, 1:06 AM EDT
Terminated Phase 3 Interventional Results available

Effect of Vitamin D Supplement on Inflammation Markers in High-Risk Cardiovascular Patients With Chronic Kidney Disease

NCT01012414
View directory record Official record
Conditions
Coronary Artery Disease, Chronic Kidney Disease, Hypovitaminosis D, Secondary Hyperparathyroidism
Interventions
paricalcitol, placebo
Drug
Lead sponsor
Thomas Jefferson University
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 20, 2014 · Synced Oct 6, 2026, 1:06 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Safety Study of Riluzole to Treat Post-traumatic Stress Disorder (PTSD)

NCT02155829
View directory record Official record
Conditions
PTSD
Interventions
Riluzole, Placebo (for Riluzole)
Drug
Lead sponsor
Uniformed Services University of the Health Sciences
Federal
Eligibility
18 Years to 65 Years
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
2
States / cities
Bethesda, Maryland • Syracuse, New York
Source: ClinicalTrials.gov public record
Updated May 24, 2021 · Synced Oct 6, 2026, 1:06 AM EDT
Not listed Not applicable Interventional

Epigenetics, Vitamin C, and Abnormal Blood Cell Formation - Vitamin C in Patients With Low-Risk Myeloid Malignancies

NCT03682029
View directory record Official record
Conditions
Myelodysplastic Syndromes, Chronic Myelomonocytic Leukemia-1, Cytopenia
Interventions
Vitamin C (ascorbic acid), Placebo
Dietary Supplement · Other
Lead sponsor
Copenhagen University Hospital, Rigshospitalet
Other
Eligibility
18 Years and older
Enrollment
109 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2025
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 17, 2024 · Synced Oct 6, 2026, 1:06 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Effects of PS-IPC Supplementation on Muscle Mass and Functional Outcomes in Older Adults

NCT00926250
View directory record Official record
Conditions
Immune Senescence, Sarcopenia
Interventions
Oral PS-IPC supplement, Placebo supplement
Dietary Supplement
Lead sponsor
University of Arkansas
Other
Eligibility
60 Years to 85 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Jan 18, 2012 · Synced Oct 6, 2026, 1:06 AM EDT
Terminated Phase 4 Interventional Results available

Effects of Supplementation With PUFAs and Antioxidants for Contact Lens Discomfort

NCT04163328
View directory record Official record
Conditions
Dry Eye, Contact Lens Complication
Interventions
HydroEye®
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years and older
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Mar 6, 2025 · Synced Oct 6, 2026, 1:06 AM EDT
Completed Not applicable Interventional Results available

Single Low-Dose of Supplement Amino Acid

NCT01540773
View directory record Official record
Conditions
Growth Hormone, Amino Acid
Interventions
Amino acid supplement, Placebo
Drug
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 70 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Oct 22, 2018 · Synced Oct 6, 2026, 1:06 AM EDT
Withdrawn Phase 1 Interventional Accepts healthy volunteers

O2 Transport and Utilization in Health and Lung Disease

NCT04014712
View directory record Official record
Conditions
COPD, Tetrahydrobiopterin Deficiency, Oxidative Stress
Interventions
Tetrahydrobiopterin, Placebo oral tablet
Drug
Lead sponsor
University of Massachusetts, Amherst
Other
Eligibility
18 Years to 85 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Amherst, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 19, 2023 · Synced Oct 6, 2026, 1:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of an Aromatic Botanical Extract on Respiratory Health.

NCT04368169
View directory record Official record
Conditions
Respiratory Health
Interventions
Teramune Botanical Extract, Placebo
Dietary Supplement · Other
Lead sponsor
Nutraceuticals Research Institute
Other
Eligibility
18 Years to 60 Years · Female only
Enrollment
71 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
Franklin, Tennessee
Source: ClinicalTrials.gov public record
Updated Feb 26, 2021 · Synced Oct 6, 2026, 1:06 AM EDT
Completed Phase 1 Interventional

Probiotics and Oxytocin Nasal Spray on Social Behaviors of Autism Spectrum Disorder (ASD) Children

NCT03337035
View directory record Official record
Conditions
Autism Spectrum Disorder
Interventions
intranasal oxytocin, oral probiotics, oral placebo
Drug · Dietary Supplement
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
3 Years to 25 Years
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Charlestown, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 4, 2020 · Synced Oct 6, 2026, 1:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Does Daily Supplementation of Lactobacillus Acidophilus MPH734, for One Week, Affect Acute (Immediate), Subacute (7 Days), and Post-treatment Discontinuation Lactose Metabolism, Gastrointestinal Symptoms, and Clinical Markers of Inflammation and Safety Compared to a Placebo

NCT04531033
View directory record Official record
Conditions
Lactose Intolerance
Interventions
Lactobacillus acidophilus MPH734, Placebo
Dietary Supplement
Lead sponsor
Lemuel W. Taylor IV
Other
Eligibility
18 Years to 55 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Belton, Texas
Source: ClinicalTrials.gov public record
Updated May 16, 2024 · Synced Oct 6, 2026, 1:06 AM EDT
Recruiting Phase 2 Interventional

Prevent Cardiac Surgery Associated AKI Trial

NCT06620523
View directory record Official record
Conditions
Renal Failure, Coronary Artery Disease, Surgery, Surgery-Complications
Interventions
CoQ10 1200 mg orally with Glutathione 1000 mg orally, Group B: Placebo CoQ10 orally and Placebo Glutathione orally
Drug
Lead sponsor
George Washington University
Other
Eligibility
18 Years to 70 Years
Enrollment
242 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Oct 8, 2025 · Synced Oct 6, 2026, 1:06 AM EDT
Completed Phase 2 Interventional

Soy Protein Supplement In Treating Hot Flashes in Postmenopausal Women Receiving Tamoxifen for Breast Disease

NCT00031720
View directory record Official record
Conditions
Breast Cancer, Hot Flashes, Hot Flushes
Interventions
soy protein, isoflavones, Tamoxifen, Placebo
Dietary Supplement · Drug · Other
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
18 Years and older · Female only
Enrollment
112 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2013
U.S. locations
14
States / cities
Rockford, Illinois • Elkhart, Indiana • Kokomo, Indiana + 9 more
Source: ClinicalTrials.gov public record
Updated Jul 13, 2016 · Synced Oct 6, 2026, 1:06 AM EDT
Completed Not applicable Interventional

Galectin-3 Blockade in Patients With High Blood Pressure

NCT01960946
View directory record Official record
Conditions
Hypertension
Interventions
Modified Citrus Pectin (MCP) vs placebo
Dietary Supplement
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
21 Years to 70 Years
Enrollment
59 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 21, 2021 · Synced Oct 6, 2026, 1:06 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Metabolic Responses to Spermidine Supplementation.

NCT05459961
View directory record Official record
Conditions
Healthy Subjects
Interventions
oral spermidine
Dietary Supplement
Lead sponsor
Chrysea Labs Lda
Industry
Eligibility
50 Years to 70 Years · Male only
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Addison, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 30, 2024 · Synced Oct 6, 2026, 1:06 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Lycopene in Preventing Prostate Cancer in Healthy Participants

NCT00322114
View directory record Official record
Conditions
Prostate Cancer
Interventions
lycopene, placebo
Dietary Supplement · Other
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
18 Years and older · Male only
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2006
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 20, 2013 · Synced Oct 6, 2026, 1:06 AM EDT
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 16, 2019 · Synced Oct 6, 2026, 1:06 AM EDT
Recruiting Phase 2 Interventional

MitoQ and Ischemic Conditioning To Assess Vascular Health Outcomes

NCT06930638
View directory record Official record
Conditions
Stroke
Interventions
Ischemic Conditioning, Antioxidant Supplement
Device · Dietary Supplement
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Years to 85 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Sep 25, 2025 · Synced Oct 6, 2026, 1:06 AM EDT
Withdrawn Phase 4 Interventional

Pilot E2 for Hypogonadal Women With CFBD

NCT03724955
View directory record Official record
Conditions
Cystic Fibrosis Related Bone Disease
Interventions
Estradiol 2 mg, Placebo
Drug · Other
Lead sponsor
Emory University
Other
Eligibility
18 Years and older · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Apr 18, 2019 · Synced Oct 6, 2026, 1:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

NAD+ Oral Supplement Pilot Intervention in Adult Females

NCT06579209
View directory record Official record
Conditions
Cognitive Change, Inflammation, Neurodegenerative Diseases
Interventions
Treatment, Placebo
Dietary Supplement · Other
Lead sponsor
University of Rhode Island
Other
Eligibility
40 Years to 80 Years · Female only
Enrollment
53 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
2
States / cities
Kingston, Rhode Island • Pawtucket, Rhode Island
Source: ClinicalTrials.gov public record
Updated Mar 12, 2026 · Synced Oct 6, 2026, 1:06 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Renewal-NAD+: A Study of Oral NAD+ and Its Multi-omic Impact in a Healthy Cohort

NCT07336836
View directory record Official record
Conditions
Health Adult Subjects, Healthy Participants
Interventions
LathMized TM NAD+ (LNAD+), Control (placebo)
Dietary Supplement · Other
Lead sponsor
BioNADrx Holdings, Inc. Bryleos
Industry
Eligibility
45 Years to 75 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jan 13, 2026 · Synced Oct 6, 2026, 1:06 AM EDT
Active, not recruiting Phase 1 Interventional

Microbiota Transplant With Antibiotic Preconditioning and Fiber Supplementation in PAH.

NCT07751120
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
MTT with antibiotic preconditioning + fiber supplementation, MTT with antibiotic preconditioning + placebo supplementation, MTT with placebo + placebo supplementation.
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 75 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 28, 2026 · Synced Oct 6, 2026, 1:06 AM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

Gut Microbiome Response to Long-Haul Travel in Elite Football Players

NCT07585474
View directory record Official record
Conditions
Microbial Composition, Immune Function
Interventions
Probiotic Capsule, Placebo
Drug
Lead sponsor
Sheffield Hallam University
Other
Eligibility
18 Years to 40 Years · Male only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated May 13, 2026 · Synced Oct 6, 2026, 1:06 AM EDT