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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Antioxidant Clear all
Completed Early Phase 1 Interventional Accepts healthy volunteers

Sex Hormones and Atherosclerosis Prevention in Perimenopausal Women

NCT02042196
View directory record Official record
Conditions
Menopause, Aging
Interventions
KUVAN, Placebo, Cetrotide, Climara, Placebo transdermal patch
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 70 Years · Female only
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2016
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 10, 2019 · Synced Sep 16, 2026, 8:18 PM EDT
Completed Phase 1 Interventional

Lipoic Acid as a Treatment for Acute Optic Neuritis

NCT01294176
View directory record Official record
Conditions
Optic Neuritis
Interventions
Lipoic Acid
Drug
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years to 65 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Apr 25, 2019 · Synced Sep 16, 2026, 8:18 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Endothelial Dysfunction After SCI

NCT07227727
View directory record Official record
Conditions
Spinal Cord Injuries, Endothelial Dysfunction
Interventions
Intra-arterial Infusion of Vasoactive Agents, Intra-arterial Vitamin C Infusion, Blood Sampling
Procedure
Lead sponsor
Craig Hospital
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Englewood, Colorado
Source: ClinicalTrials.gov public record
Updated Nov 13, 2025 · Synced Sep 16, 2026, 8:18 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Pilot Study of Losartan and N-acetylcysteine as Inhibitors of Muscle Oxidative Stress in Elderly

NCT01384591
View directory record Official record
Conditions
Aging
Interventions
N-acetylcysteine, Losartan, Placebo losartan, Placebo N-acetylcysteine
Drug
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
60 Years to 85 Years
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2015
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated May 7, 2018 · Synced Sep 16, 2026, 8:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Water-soluble Olive Extract Supplementation

NCT01113827
View directory record Official record
Conditions
Healthy
Interventions
Olive Extract, Placebo
Dietary Supplement
Lead sponsor
University of Texas at Austin
Other
Eligibility
20 Years to 35 Years · Male only
Enrollment
61 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Mar 26, 2012 · Synced Sep 16, 2026, 8:18 PM EDT
Completed Not applicable Interventional

Impact of Maternal Pomegranate Juice on Brain Injury in Infants With Intrauterine Growth Restriction (IUGR)

NCT00788866
View directory record Official record
Conditions
Intrauterine Growth Restriction
Interventions
Pomegranate Juice, Placebo
Dietary Supplement
Lead sponsor
Washington University School of Medicine
Other
Eligibility
Female only
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 16, 2014 · Synced Sep 16, 2026, 8:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A 4-week Study Investigating Two Targeted Brightening Serum (A and B) Versus 4% Hydroquinone in Women With Mild to Severe Full-face Hyperpigmentation

NCT07644871
View directory record Official record
Conditions
Hyperpigmentation, Melasma, Dark Spots
Interventions
Facial Cleanser, Facial Moisturizer, Sunscreen SPF 55
Other
Lead sponsor
Revision Skincare
Industry
Eligibility
20 Years to 60 Years · Female only
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Irving, Texas
Source: ClinicalTrials.gov public record
Updated Jun 11, 2026 · Synced Sep 16, 2026, 8:18 PM EDT
Completed Phase 2 Interventional Results available

Trial of Nicotinamide Riboside and Co-enzyme Q10 in Chronic Kidney Disease

NCT03579693
View directory record Official record
Conditions
Chronic Kidney Disease, Sarcopenia, Frailty
Interventions
CoQ10, Nicotinamide riboside, Placebo
Dietary Supplement
Lead sponsor
University of Washington
Other
Eligibility
30 Years to 79 Years
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jan 9, 2023 · Synced Sep 16, 2026, 8:18 PM EDT
Completed Phase 3 Interventional Results available

Adaptive COVID-19 Treatment Trial 4 (ACTT-4)

NCT04640168
View directory record Official record
Conditions
COVID-19
Interventions
Baricitinib, Dexamethasone, Placebo, Remdesivir
Drug · Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 99 Years
Enrollment
1,010 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
61
States / cities
Birmingham, Alabama • Fresno, California • La Jolla, California + 50 more
Source: ClinicalTrials.gov public record
Updated Jun 27, 2022 · Synced Sep 16, 2026, 8:18 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

A Randomized, Double-Blind Study to Assess the Effect of a Postbiotic on Oxidative Stress and Exercise Performance

NCT06795425
View directory record Official record
Conditions
Oxidative Stress, Healthy, Exercise-induced Muscle Damage, Exercise-induced Muscle Soreness, Immune Function, Gut Health, Microbiome Analysis, Exercise Performance, Exercise Metabolism
Interventions
Postbiotic Active Lifestyle Blend, Placebo
Dietary Supplement · Other
Lead sponsor
Lindenwood University
Other
Eligibility
18 Years to 45 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Saint Charles, Missouri
Source: ClinicalTrials.gov public record
Updated Jan 27, 2025 · Synced Sep 16, 2026, 8:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of VisionPure™ on Indices of Vision Health and Cognitive Function

NCT05533658
View directory record Official record
Conditions
Eye Health, Vision, Cognitive Function
Interventions
VisionPure Dietary Supplement, Placebo
Dietary Supplement
Lead sponsor
Applied Science & Performance Institute
Industry
Eligibility
18 Years to 40 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
3
States / cities
Lutz, Florida • Tampa, Florida
Source: ClinicalTrials.gov public record
Updated May 25, 2023 · Synced Sep 16, 2026, 8:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effects of Avocado When Added to a Meat Patty on Inflammation in Healthy Men

NCT01397071
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Avocado
Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years to 35 Years · Male only
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Sep 24, 2019 · Synced Sep 16, 2026, 8:18 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Improving Exercise Rehabilitation Efficacy Outcomes Veterans Peripheral Artery Disease

NCT05648630
View directory record Official record
Conditions
Peripheral Artery Disease (D058729), Oxidative Stress (D018384), Inflammation (D007249)
Interventions
PB125, Placebo, Exercise Rehabilitation
Dietary Supplement · Behavioral
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
40 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
2
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Nov 9, 2025 · Synced Sep 16, 2026, 8:18 PM 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 5, 2025 · Synced Sep 16, 2026, 8:18 PM EDT
Completed Not applicable Interventional Results available

A Placebo-controlled Trial of Daliresp on Chronic Obstructive Pulmonary Disease (COPD)

NCT01572948
View directory record Official record
Conditions
COPD
Interventions
roflumilast, placebo
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
40 Years and older
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Oct 18, 2015 · Synced Sep 16, 2026, 8:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Purple Grape Juice Study

NCT00551746
View directory record Official record
Conditions
Cardiovascular Disease
Interventions
Purple Grape Juice
Dietary Supplement
Lead sponsor
Intermountain Health Care, Inc.
Other
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Murray, Utah
Source: ClinicalTrials.gov public record
Updated Sep 15, 2011 · Synced Sep 16, 2026, 8:18 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

The Effect of Antioxidants on Skin Blood Flow-BH4

NCT03680573
View directory record Official record
Conditions
Cardiovascular Diseases, Cardiovascular Risk Factor, Vasoconstriction
Interventions
Control: Lacated Ringers, Apocynin, Allopurinol, BH4, NG Nitro L Arginine Methyl Ester, Sodium Nitroprusside, Acetyl-ß-methylcholine chloride
Drug
Lead sponsor
The University of Texas at Arlington
Other
Eligibility
18 Years to 35 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Arlington, Texas
Source: ClinicalTrials.gov public record
Updated Sep 25, 2018 · Synced Sep 16, 2026, 8:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Fruit and Vegetable Juice Concentrate Effects on RBP4 and Antioxidant Capacity in Lean and Overweight 6-10 Year Old Boys

NCT00842543
View directory record Official record
Conditions
Obesity
Interventions
Fruit and Vegetable Juice Concentrate (FVJC), Placebo
Dietary Supplement
Lead sponsor
Nemours Children's Clinic
Other
Eligibility
6 Years to 10 Years · Male only
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Sep 25, 2013 · Synced Sep 16, 2026, 8:18 PM EDT
Completed Phase 1 Interventional

Safety, Metabolism, and Antioxidant Activity of Silymarin and Green Tea Extract in Patients With Chronic Hepatitis C

NCT01018615
View directory record Official record
Conditions
Chronic Hepatitis C, Oxidative Stress
Interventions
silymarin, green tea extract (EGCG)
Drug · Dietary Supplement
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 17, 2017 · Synced Sep 16, 2026, 8:18 PM EDT
Recruiting Phase 1Phase 2 Interventional

Adia MED of Winter Park LLC Autism Spectrum Disorder Research Study

NCT07304440
View directory record Official record
Conditions
Autism Spectrum Disorder, Autism, ASD, Autism Spectrum Disorder (ASD)
Interventions
Umbilical Cord Blood-Derived Stem Cells and Exosomes, Glutathione
Biological · Drug
Lead sponsor
Adia Med of Winter Park LLC
Other
Eligibility
3 Years to 12 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
2
States / cities
Winter Park, Florida • Green Bay, Wisconsin
Source: ClinicalTrials.gov public record
Updated Aug 20, 2026 · Synced Sep 16, 2026, 8:18 PM EDT
Completed Not applicable Interventional

Randomized Trial of a Gum Health Formulation

NCT03196648
View directory record Official record
Conditions
Periodontal Diseases, Gingivitis, Periodontitis, Halitosis
Interventions
Gingival health formulation in an accelerating device, Gingival health formulation on a toothbrush, OTC fluoride toothpaste
Other
Lead sponsor
Glo Science, Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Cambridge, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 22, 2017 · Synced Sep 16, 2026, 8:18 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study to Determine the Safety, Tolerability, and Pharmacokinetic Profile of HPN-07 and HPN-07 Plus NAC

NCT02259595
View directory record Official record
Conditions
Hearing Loss, Sensorineural Hearing Loss, Noise-Induced Hearing Loss
Interventions
HPN-07, NAC, Placebo
Drug
Lead sponsor
Otologic Pharmaceutics, Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Raleigh, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 30, 2015 · Synced Sep 16, 2026, 8:18 PM EDT
Not yet recruiting Not applicable Interventional

Feru-guard and General Antioxidant Capacity in Older People

NCT07801521
View directory record Official record
Conditions
Healthy Elder People
Interventions
Feru-guard, Placebo
Dietary Supplement · Other
Lead sponsor
Oregon Health and Science University
Other
Eligibility
65 Years to 89 Years
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Sep 2, 2026 · Synced Sep 16, 2026, 8:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Short Term Effects of Oceanix Supplementation on Recovery

NCT04315077
View directory record Official record
Conditions
Oxidative Stress, Muscle Strength, Resistance Training, Muscle Damage, Immune Suppression
Interventions
Oceanix®, Resistance Training
Dietary Supplement · Other
Lead sponsor
Applied Science & Performance Institute
Industry
Eligibility
18 Years to 45 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Nov 18, 2020 · Synced Sep 16, 2026, 8:18 PM EDT