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ClinicalTrials.gov public records Last synced Oct 5, 2026, 8:38 AM EDT

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Showing 49–72 of 86 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Oral Ascorbic Acid Clear all
Terminated Phase 1 Interventional Accepts healthy volunteers Results available

Evaluation and Treatment of Copper/Zinc Imbalance in Children With Autism

NCT00325572
View directory record Official record
Conditions
Autism, Pervasive Developmental Disorder
Interventions
oral zinc and vitamin C supplements, oral Placebo
Drug · Other
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
3 Years to 8 Years
Enrollment
89 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2011
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 17, 2019 · Synced Oct 5, 2026, 8:38 AM EDT
Completed No phase listed Observational

Low Dose Vitamin C in Burns >20% Compared to Previous Studies With High Dose Vitamin C

NCT05612867
View directory record Official record
Conditions
Burns, Ascorbic Acid Deficiency, Burn Shock, Burn Degree Second, Burn Degree Third, Fluid and Electrolyte Imbalance
Interventions
Vitamin C
Dietary Supplement
Lead sponsor
Arrowhead Regional Medical Center
Other
Eligibility
Not listed
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Colton, California
Source: ClinicalTrials.gov public record
Updated Nov 10, 2022 · Synced Oct 5, 2026, 8:38 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers Results available

Respiratory and Autonomic Plasticity Following Intermittent Hypoxia

NCT00860743
View directory record Official record
Conditions
Sleep Apnea Syndromes
Interventions
Antioxidant cocktail
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
20 Years to 40 Years
Enrollment
63 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2013
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Nov 1, 2017 · Synced Oct 5, 2026, 8:38 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Mechanisms for Vascular Dysfunction and Exercise Tolerance in CF

NCT02690064
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Acute Antioxidant, Chronic Antioxidant, Placebo
Dietary Supplement · Other
Lead sponsor
Augusta University
Other
Eligibility
7 Years and older
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2027
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 28, 2025 · Synced Oct 5, 2026, 8:38 AM EDT
Not yet recruiting Phase 1 Interventional

High-Dose Vitamin C in G6PDA and Pyruvate Kinase Deficiency: A Safety Study

NCT07612345
View directory record Official record
Conditions
Pyruvate Kinase Deficiency, Glucose 6 Phosphate Dehydrogenase Deficiency
Interventions
Vitamin C
Drug
Lead sponsor
University of Utah
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated May 28, 2026 · Synced Oct 5, 2026, 8:38 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Exercise in Health and Chronic Obstructive Pulmonary Disease

NCT02300064
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
Knee-extensor exercise test, Exercise test with restricting/releasing blood flow, Exercise test with variable oxygen concentration and MRI, Exercise test with oral antioxidant or placebo cocktail
Other
Lead sponsor
University of Utah
Other
Eligibility
18 Years and older
Enrollment
185 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2016
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jun 1, 2016 · Synced Oct 5, 2026, 8:38 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Nitric Oxide Bioavailability and Early Life Stress (NO-Stress)

NCT02115724
View directory record Official record
Conditions
Cardiovascular Disease
Interventions
Antioxidant cocktail, Biopsy, Placebo, NMD; 0.4mg sub-lingual nitroglycerin spray
Dietary Supplement · Other · Drug
Lead sponsor
Augusta University
Other
Eligibility
18 Years to 40 Years
Enrollment
74 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2027
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 28, 2025 · Synced Oct 5, 2026, 8:38 AM EDT
Terminated Phase 2Phase 3 Interventional Results available

Immunonutrition for Diabetic Foot Ulcers

NCT05281562
View directory record Official record
Conditions
Diabetes Mellitus, Diabetic Peripheral Neuropathy, Diabetic Foot Ulcer
Interventions
Lovaza, L-Arginine Powder, Vitamin C
Drug
Lead sponsor
Prisma Health-Midlands
Other
Eligibility
18 Years to 99 Years
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023
U.S. locations
1
States / cities
Columbia, South Carolina
Source: ClinicalTrials.gov public record
Updated Dec 27, 2024 · Synced Oct 5, 2026, 8:38 AM EDT
Not listed Phase 2 Interventional

Delivery of Inhibitors of Lysyl Oxidase (LysoLox) on Serial Angioplasty and Time to Restenosis

NCT03106948
View directory record Official record
Conditions
Arteriovenous Fistula Occlusion
Interventions
Placebo, Ascorbic Acid, Cuprimine Oral Product
Drug
Lead sponsor
Southeast Renal Research Institute
Other
Eligibility
18 Years to 90 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Chattanooga, Tennessee
Source: ClinicalTrials.gov public record
Updated Sep 11, 2017 · Synced Oct 5, 2026, 8:38 AM EDT
Completed Not applicable Interventional

The Effect of Vitamin C on Wound Healing In Mandibular Fracture Patients

NCT03938584
View directory record Official record
Conditions
Vitamin C Deficiency, Smoking, Surgery, Surgery--Complications, Wound, Wound Complication, Wound Infection, Wound Dehiscence, Wound of Skin, Mandible Fracture, Mandible Open Fracture, Mandible Closed Fracture, Mandibular Fractures, Ascorbic Acid Deficiency, Oxidative Stress, Inflammation
Interventions
Vitamin C, Placebo
Dietary Supplement · Other
Lead sponsor
Hennepin Healthcare Research Institute
Other
Eligibility
18 Years and older
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 26, 2022 · Synced Oct 5, 2026, 8:38 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Renal Metabolism of Glycolate to Oxalate

NCT04437225
View directory record Official record
Conditions
Healthy
Interventions
Low oxalate controlled Diet, Primed, continuous intravenous infusion of 13C2-Glycolate, Bolus intravenous infusion of 13C2-Glycolate, Oral bolus administration of 13C2-Glycolate
Dietary Supplement · Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 75 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2030
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 27, 2026 · Synced Oct 5, 2026, 8:38 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

An Investigation of a Multi-Function Skincare Product to Improve Aging, Eczema, and Acne Outcomes

NCT05873933
View directory record Official record
Conditions
Acne, Eczema, Skin Aging
Interventions
Hemptress Oil
Other
Lead sponsor
Hemptress
Industry
Eligibility
21 Years to 65 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Oct 9, 2024 · Synced Oct 5, 2026, 8:38 AM EDT
Active, not recruiting Phase 2 Interventional

A Phase 2 Trial of High-Dose Ascorbate in Glioblastoma Multiforme

NCT02344355
View directory record Official record
Conditions
Glioblastoma Multiforme
Interventions
Temozolomide, radiation therapy, Ascorbic Acid
Drug · Radiation
Lead sponsor
Bryan Allen
Other
Eligibility
18 Years and older
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2028
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Sep 30, 2026 · Synced Oct 5, 2026, 8:38 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Combinatorial Nutritional Supplementation on Immune Function in Healthy Older Adults

NCT02876315
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Redoxon VI, placebo
Dietary Supplement
Lead sponsor
Oregon State University
Other
Eligibility
55 Years to 75 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Corvallis, Oregon
Source: ClinicalTrials.gov public record
Updated Dec 1, 2022 · Synced Oct 5, 2026, 8:38 AM EDT
Recruiting Phase 2 Interventional

Assessment of Medrol Dosepak to Reduce Opioid Consumption in Foot and Ankle Surgical Patients

NCT06780202
View directory record Official record
Conditions
Foot Injuries and Disorders, Ankle Injuries and Disorders, Achilles Tendon Injury
Interventions
medrol dosepak, HYDROcodone Oral Tablet
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years to 95 Years
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
2
States / cities
Atlanta, Georgia • Johns Creek, Georgia
Source: ClinicalTrials.gov public record
Updated Mar 9, 2026 · Synced Oct 5, 2026, 8:38 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Fatigue Reduction Diet

NCT01902745
View directory record Official record
Conditions
Chronic Fatigue
Interventions
Social Cognitive Theory
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Feb 6, 2017 · Synced Oct 5, 2026, 8:38 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Study of the Effects of Vitamin C on Patients With Type 2 Diabetes

NCT00001870
View directory record Official record
Conditions
Diabetes Mellitus, Non-Insulin Dependent, Non-Insulin Dependent
Interventions
Acetylcholine
Drug
Lead sponsor
National Center for Complementary and Integrative Health (NCCIH)
NIH
Eligibility
Not listed
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1999 – 2004
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 4, 2008 · Synced Oct 5, 2026, 8:38 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Supplementary Vitamins on Oxidant Gene Expression in the Lungs of Healthy Smokers

NCT00565214
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease (COPD)
Interventions
Group 1, Group 2
Dietary Supplement
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years to 70 Years
Enrollment
46 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 May 25, 2017 · Synced Oct 5, 2026, 8:38 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety and Immunogenicity of Peru-15-pCTB in Healthy Adult Subjects

NCT00654108
View directory record Official record
Conditions
Gastroenteritis Escherichia Coli
Interventions
Ciprofloxacin, Peru-15-pCTB, Sodium bicarbonate/Ascorbic Acid/Aspartame Buffer
Drug · Biological · Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 45 Years
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 29, 2021 · Synced Oct 5, 2026, 8:38 AM EDT
Completed Phase 3 Interventional Results available

Prophylaxis to Reduce Postoperative Atrial Fibrillation in Cardiac Surgery

NCT00953212
View directory record Official record
Conditions
Atrial Fibrillation, Atrial Flutter
Interventions
beta blockers, amiodarone, ascorbic acid
Drug
Lead sponsor
MaineHealth
Other
Eligibility
18 Years and older
Enrollment
304 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Portland, Maine
Source: ClinicalTrials.gov public record
Updated Apr 26, 2018 · Synced Oct 5, 2026, 8:38 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Outpatient Cervical Ripening With Orally Administered Misoprostol in Diabetics

NCT00514618
View directory record Official record
Conditions
Diabetes, Gestational
Interventions
Misoprostol, Placebo
Drug · Dietary Supplement
Lead sponsor
MemorialCare Health System
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2008
U.S. locations
1
States / cities
Long Beach, California
Source: ClinicalTrials.gov public record
Updated Nov 7, 2023 · Synced Oct 5, 2026, 8:38 AM EDT
Active, not recruiting Phase 1 Interventional Results available

A Safety Study of Pharmacologic Ascorbate and Ferumoxytol in Addition to Standard of Care Chemoradiation in Glioblastoma

NCT04900792
View directory record Official record
Conditions
Glioblastoma, Glioblastoma Multiforme
Interventions
Ferumoxytol injection, Pharmacological ascorbate, External beam radiation therapy, Temozolomide
Drug · Radiation
Lead sponsor
Bryan Allen
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Jul 20, 2026 · Synced Oct 5, 2026, 8:38 AM EDT
Withdrawn Not applicable Interventional

EoE Food Desensitization

NCT02881372
View directory record Official record
Conditions
Eosinophilic Esophagitis
Interventions
Oral food desensitization
Other
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
3 Years to 17 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 9, 2024 · Synced Oct 5, 2026, 8:38 AM EDT
Completed Phase 1 Interventional

Vitamin E Pharmacokinetics and Biomarkers in Normal and Obese Women

NCT00862433
View directory record Official record
Conditions
Diabetes, Fatty Liver, Obesity, Healthy Volunteers
Interventions
Alpha tocopherol, Vitamin E, Vitamin C
Drug · Other
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 55 Years · Female only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2022
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 2, 2026 · Synced Oct 5, 2026, 8:38 AM EDT