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ClinicalTrials.gov public records Last synced Oct 2, 2026, 9:16 AM EDT

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Showing 49–72 of 186 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Vitamin C Placebo Clear all
Completed Not applicable Interventional Accepts healthy volunteers

TKA Melatonin and Sleep Quality

NCT05332717
View directory record Official record
Conditions
Arthroplasty, Replacement, Knee, Sleep Initiation and Maintenance Disorders
Interventions
Melatonin 5 mg, Placebo (Vitamin C)
Dietary Supplement
Lead sponsor
Hospital for Special Surgery, New York
Other
Eligibility
18 Years and older
Enrollment
176 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 14, 2023 · Synced Oct 2, 2026, 9:16 AM EDT
Completed Not applicable Interventional

The Effects of a High Protein Diet on Microbiota, Gastrointestinal Function and Wellness in Older Women

NCT02445560
View directory record Official record
Conditions
Aging
Interventions
Probiotic capsule and Fiber Sachet, Probiotic capsule and Placebo sachet, Placebo capsule and Fiber Sachet, Placebo capsule and Placebo sachet
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
65 Years and older · Female only
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015
U.S. locations
2
States / cities
Gainesville, Florida • Ocala, Florida
Source: ClinicalTrials.gov public record
Updated Mar 29, 2018 · Synced Oct 2, 2026, 9:16 AM EDT
Completed Phase 2 Interventional Results available

The Efficacy, Safety and Tolerability of Oral LPCN 1144 in Subjects With Nonalcoholic Steatohepatitis

NCT04134091
View directory record Official record
Conditions
Nonalcoholic Steatohepatitis (NASH)
Interventions
LPCN 1144 Formulation A, LPCN 1144 Formulation B, Placebo
Drug
Lead sponsor
Lipocine Inc.
Industry
Eligibility
18 Years to 80 Years · Male only
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
19
States / cities
El Cajon, California • Murrieta, California • Rialto, California + 14 more
Source: ClinicalTrials.gov public record
Updated Dec 14, 2023 · Synced Oct 2, 2026, 9:16 AM EDT
Recruiting Phase 2Phase 3 Interventional

Effectiveness of Alternative Therapies in Maintaining Weight Loss Achieved by GLP-1 Medications Post-Cessation

NCT07092618
View directory record Official record
Conditions
Longevity, GLP-1, Geroscience, Aging
Interventions
Metformin, Rapamycin, Naltrexone, Vitamin C
Drug · Dietary Supplement
Lead sponsor
AgelessRx
Industry
Eligibility
40 Years to 85 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 30, 2025 · Synced Oct 2, 2026, 9:16 AM EDT
Terminated Phase 2 Interventional Results available

High Dose Vitamin C in the Critically Ill Patient

NCT01587963
View directory record Official record
Conditions
Shock
Interventions
Ascorbic Acid, Ringers Lactate or Normal Saline
Drug · Other
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated May 11, 2017 · Synced Oct 2, 2026, 9:16 AM EDT
Completed Phase 2 Interventional

Antioxidant Therapy in Lean and Obese Asthmatics

NCT01317563
View directory record Official record
Conditions
Asthma
Interventions
Vitamins A, E, C & Selenium, Placebo
Dietary Supplement
Lead sponsor
Nemours Children's Clinic
Other
Eligibility
12 Years to 25 Years
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2016
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Mar 22, 2016 · Synced Oct 2, 2026, 9:16 AM EDT
Terminated Phase 2 Interventional Results available

Effect of Antioxidant Vitamins on Coagulopathy and Nosocomial Pneumonia After Severe Trauma

NCT01897792
View directory record Official record
Conditions
Coagulopathy, Nosocomial Pneumonia
Interventions
Vitamin C, Vitamin E, Saline (for Vitamin C), Placebo (for Vitamin E)
Dietary Supplement · Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
19 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Mar 29, 2017 · Synced Oct 2, 2026, 9:16 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Vitamin C on Endothelial Function and Exercise Capacity in Fontan-Palliated Patients

NCT00974025
View directory record Official record
Conditions
Fontan Procedure, Hypoplastic Left Heart Syndrome, Tricuspid Atresia
Interventions
Vitamin C, Placebo
Dietary Supplement
Lead sponsor
University of Michigan
Other
Eligibility
8 Years to 25 Years
Enrollment
53 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 1, 2017 · Synced Oct 2, 2026, 9:16 AM EDT
Completed Phase 3 Interventional

Trial of Vitamins in HIV Progression and Transmission

NCT00197743
View directory record Official record
Conditions
HIV Infections, Disease Transmission, Vertical
Interventions
Vitamin A + Beta Carotene, Multivitamins, Placebo
Dietary Supplement · Other
Lead sponsor
Harvard School of Public Health (HSPH)
Other
Eligibility
18 Years and older · Female only
Enrollment
1,085 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1995 – 2003
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 11, 2010 · Synced Oct 2, 2026, 9:16 AM EDT
Completed Phase 2 Interventional Results available

Vitamin C Infusion for TReatment in Sepsis and Alcoholic Hepatitis

NCT03829683
View directory record Official record
Conditions
Alcoholic Hepatitis, Sepsis
Interventions
Vitamin C, Dextrose 5% in water
Drug
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Aug 28, 2023 · Synced Oct 2, 2026, 9:16 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Examining the Effect of Mental Health Disorders on Vascular Function and Exercise Tolerance

NCT03216980
View directory record Official record
Conditions
Mental Health Disorders
Interventions
PTSD/GAD Antioxidant, PTSD/GAD Placebo, Healthy Control Antioxidant, Healthy Control Placebo
Dietary Supplement
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years to 35 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Aug 25, 2021 · Synced Oct 2, 2026, 9:16 AM EDT
Recruiting Not applicable Interventional

Anti-inflammatory Activities of Vitamin C Supplementation on the Gut Barrier Function in Adults With Obesity

NCT07151105
View directory record Official record
Conditions
Adequate Vitamin C Status, Inadequate Vitamin C Status
Interventions
Vitamin C Supplement + Low Vitamin C Diet, Placebo + Low Vitamin C Diet
Dietary Supplement
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 50 Years
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 1, 2026 · Synced Oct 2, 2026, 9:16 AM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

A Study to Assess the Impact of a Nutritional Supplement on Wellbeing and Nutrient Absorption

NCT06749808
View directory record Official record
Conditions
Nutrition Status
Interventions
Carotenoid Nutritional Supplement, Placebo
Dietary Supplement
Lead sponsor
Pharmanex
Industry
Eligibility
20 Years to 65 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Provo, Utah
Source: ClinicalTrials.gov public record
Updated Dec 31, 2024 · Synced Oct 2, 2026, 9:16 AM EDT
Completed Phase 2 Interventional Results available

Acetaminophen and Ascorbate in Sepsis: Targeted Therapy to Enhance Recovery

NCT04291508
View directory record Official record
Conditions
Acute Respiratory Distress Syndrome, Critical Illness, Respiratory Failure, Sepsis
Interventions
Intravenous Acetaminophen (room temperature), Intravenous Vitamin C (refrigerated), 5% Dextrose (room temperature), 5% Dextrose refrigerated
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
488 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
41
States / cities
Birmingham, Alabama • Tucson, Arizona • Fresno, California + 34 more
Source: ClinicalTrials.gov public record
Updated Sep 27, 2024 · Synced Oct 2, 2026, 9:16 AM EDT
Completed Not applicable Interventional

Study of Glutathione, Vitamin C and Cysteine in Children With Autism and Severe Behavior Problems

NCT00889538
View directory record Official record
Conditions
Autism, Severe Behavior Disorder
Interventions
placebo, glutathione, glutathione, vit C and NAC
Drug
Lead sponsor
University of Louisville
Other
Eligibility
5 Years to 16 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Louisville, Kentucky
Source: ClinicalTrials.gov public record
Updated Dec 7, 2016 · Synced Oct 2, 2026, 9:16 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Vitamins C and Vitamin E and Cardiovascular Risk

NCT00362518
View directory record Official record
Conditions
Diabetes
Interventions
Study Arm A, Study Arm B, Study Arm C, Study Arm D
Dietary Supplement
Lead sponsor
University of New Mexico
Other
Eligibility
18 Years to 75 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2008
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Mar 12, 2024 · Synced Oct 2, 2026, 9:16 AM EDT
Suspended Phase 2 Interventional

A Study of Gemcitabine ± Erlotinib and DN-101 Versus Gemcitabine ± Erlotinib and Placebo in Patients With Advanced Pancreatic Cancer

NCT00536770
View directory record Official record
Conditions
Pancreatic Cancer
Interventions
placebo + gemcitabine + erlotinib, Placebo + gemcitabine, calcitriol + gemcitabine, calcitriol + gemcitabine + erlotinib
Drug
Lead sponsor
Novacea
Industry
Eligibility
18 Years and older
Enrollment
132 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2007
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Nov 6, 2007 · Synced Oct 2, 2026, 9:16 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Double-Blinded Clinical Trial Using Apatone®B for Symptomatic Postoperative Total Joint Replacements

NCT01272830
View directory record Official record
Conditions
Edematous, Synovitis, Foreign Body Reaction, Osteolysis
Interventions
Placebo, Apatone®B
Drug
Lead sponsor
IC-MedTech Corporation
Industry
Eligibility
50 Years to 85 Years
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2015
U.S. locations
1
States / cities
Akron, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 31, 2018 · Synced Oct 2, 2026, 9:16 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Investigating the Wrinkle Reduction Potential of a Novel Compounded Skin Care Cream

NCT03878381
View directory record Official record
Conditions
Skin Care
Interventions
Skin Care Cream, Placebo
Combination Product · Drug
Lead sponsor
Wayne State University
Other
Eligibility
20 Years to 60 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Dearborn, Michigan
Source: ClinicalTrials.gov public record
Updated Nov 1, 2022 · Synced Oct 2, 2026, 9:16 AM EDT
Completed Phase 4 Interventional

Impact of Ascorbic Acid on Post-Cardiothoracic Surgery Inflammation

NCT00519337
View directory record Official record
Conditions
Cardiac Surgery, Inflammation
Interventions
Ascorbic acid, Placebo
Drug
Lead sponsor
Hartford Hospital
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Hartford, Connecticut
Source: ClinicalTrials.gov public record
Updated Jan 5, 2012 · Synced Oct 2, 2026, 9:16 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

Hydroxychloroquine for COVID-19 Post-exposure Prophylaxis (PEP)

NCT04328961
View directory record Official record
Conditions
COVID-19, Corona Virus Infection, SARS (Severe Acute Respiratory Syndrome), SARS-CoV-2
Interventions
Hydroxychloroquine Sulfate, Ascorbic Acid
Drug
Lead sponsor
University of Washington
Other
Eligibility
18 Years to 80 Years
Enrollment
943 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
8
States / cities
Los Angeles, California • New Orleans, Louisiana • Baltimore, Maryland + 4 more
Source: ClinicalTrials.gov public record
Updated Dec 16, 2021 · Synced Oct 2, 2026, 9:16 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Ischemia/Reperfusion Injury of Human Endothelium: Role of Glucose and Statins

NCT00995670
View directory record Official record
Conditions
Hyperglycemia
Interventions
5% dextrose, Vitamin C, Simvastatin, Sevoflurane
Drug
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
18 Years to 35 Years
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 17, 2015 · Synced Oct 2, 2026, 9:16 AM EDT
Terminated Phase 1 Interventional Results available

Clinical Utility of Endothelial Dysfunction in PAD

NCT00491751
View directory record Official record
Conditions
Peripheral Arterial Disease
Interventions
atorvastatin, ascorbic acid, Placebo
Drug
Lead sponsor
Boston University
Other
Eligibility
18 Years and older
Enrollment
108 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 27, 2018 · Synced Oct 2, 2026, 9:16 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Probiotic Intake on Intestinal Permeability in Healthy Adults

NCT03611400
View directory record Official record
Conditions
Intestinal Barrier Function
Interventions
Probiotic, Placebo
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
21 Years to 50 Years
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jun 21, 2019 · Synced Oct 2, 2026, 9:16 AM EDT