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ClinicalTrials.gov public records Last synced Oct 19, 2026, 10:27 AM EDT

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Showing 1–24 of 1,843 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Supplementation Clear all
Completed Phase 2 Interventional Results available

Vitamin D Supplementation as a Neoadjuvant for Photodynamic Therapy of Actinic Keratoses

NCT04140292
View directory record Official record
Conditions
Actinic Keratosis
Interventions
Photodynamic therapy (PDT), Vitamin D3
Drug
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 24, 2022 · Synced Oct 19, 2026, 10:27 AM EDT
Recruiting Phase 2 Interventional

FAST for DM - Fatty Acid Supplementation Trial (FAST) for Dermatomyositis (DM)

NCT07111065
View directory record Official record
Conditions
Dermatomyositis (DM), Juvenile Dermatomyositis (JDM)
Interventions
FISH OIL 500MG OMEGA-3 SOFT GEL MINIS, Placebo
Dietary Supplement
Lead sponsor
National Institute of Environmental Health Sciences (NIEHS)
NIH
Eligibility
18 Years to 60 Years
Enrollment
3,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2031
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 19, 2026 · Synced Oct 19, 2026, 10:27 AM EDT
Completed Not applicable Interventional Results available

Point-of-Care Glucose Testing and Insulin Supplementation

NCT01702311
View directory record Official record
Conditions
Diabetes
Interventions
Bedtime insulin Aspart (Novolog)
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years to 80 Years
Enrollment
235 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
2
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 3, 2018 · Synced Oct 19, 2026, 10:27 AM EDT
Completed Not applicable Interventional

Fully Remote, Telehealth-based Ketogenic Metabolic Therapy for Long COVID

NCT07745699
View directory record Official record
Conditions
Long COVID Fatigue
Interventions
Ketogenic Metabolic Therapy, Lifestyle Intervention
Other · Behavioral
Lead sponsor
National University of Natural Medicine
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Aug 6, 2026 · Synced Oct 19, 2026, 10:27 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Multidisciplinary Intervention for Mild Cognitive Impairment

NCT02943187
View directory record Official record
Conditions
Mild Cognitive Impairment
Interventions
Cognitive training, Nutrition
Behavioral · Dietary Supplement
Lead sponsor
Gibson Institute of Cognitive Research
Industry
Eligibility
50 Years to 75 Years
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2022
U.S. locations
1
States / cities
Colorado Springs, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 27, 2021 · Synced Oct 19, 2026, 10:27 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Oral Supplementation With a Black Pepper Extract

NCT05199012
View directory record Official record
Conditions
Waist Circumference, Triglycerides, Appetite, Inflammation, Lipids
Interventions
Black pepper extract
Dietary Supplement
Lead sponsor
The Center for Applied Health Sciences, LLC
Industry
Eligibility
21 Years to 65 Years
Enrollment
86 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Canfield, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 13, 2023 · Synced Oct 19, 2026, 10:27 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Influenza Virus Vaccine Plus Vitamin A and D Supplements for Prevention of Respiratory Virus Infections in Children

NCT02649192
View directory record Official record
Conditions
Healthy Participants
Interventions
Influenza virus vaccine, Vitamins A and D, Placebo
Biological · Dietary Supplement · Other
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
2 Years to 8 Years
Enrollment
87 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 29, 2019 · Synced Oct 19, 2026, 10:27 AM EDT
Completed Not applicable Interventional

Hydrolyzed Casein and Whey Protein Supplementation and the Addition of Leucine to Induce Protein Anabolism in Malnourished COPD Patients

NCT01154400
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
Casein protein hydrolysates, Whey protein hydrolysates, Casein protein hydrolysates + LEU, Whey protein hydrolysates + LEU
Dietary Supplement
Lead sponsor
Texas A&M University
Other
Eligibility
45 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Oct 15, 2012 · Synced Oct 19, 2026, 10:27 AM EDT
Completed Early Phase 1 Interventional

Oral Intradialytic Amino Acid Supplementation to Vitalize End-stage Kidney Disease Patients on Hemodialysis

NCT05705414
View directory record Official record
Conditions
End Stage Renal Disease
Interventions
Valine, EEA
Drug
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
18 Years to 64 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Aug 26, 2026 · Synced Oct 19, 2026, 10:27 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Placebo Controlled Double Masked Clinical Assessment Study of Essential Fatty Acid Supplement and Its Effect on Patients With Apparent Aqueous Deficient Dry Eye Syndrome

NCT00344721
View directory record Official record
Conditions
Dry Eye Syndrome
Interventions
Omega-3 fatty acid supplement, Placebo
Dietary Supplement
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 90 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2008
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated May 14, 2018 · Synced Oct 19, 2026, 10:27 AM EDT
Recruiting Not applicable Interventional

BHB & CAR-T for Lymphomas

NCT06610344
View directory record Official record
Conditions
Large B-cell Lymphoma
Interventions
R-1,3-Butanediol
Dietary Supplement
Lead sponsor
Abramson Cancer Center at Penn Medicine
Other
Eligibility
18 Years and older
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 23, 2026 · Synced Oct 19, 2026, 10:27 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Heat Therapy and Omega 3 on Cardio-Metabolic Health

NCT04051034
View directory record Official record
Conditions
Hypertension
Interventions
Omega 3, Placebo
Dietary Supplement · Other
Lead sponsor
Texas Tech University
Other
Eligibility
18 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Aug 14, 2019 · Synced Oct 19, 2026, 10:27 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

How Does Iron Supplementation Affect Training and Performance in Female Collegiate Rowers?

NCT01383798
View directory record Official record
Conditions
Iron Deficiency (Without Anemia)
Interventions
Placebo, Ferrous sulfate
Dietary Supplement
Lead sponsor
Cornell University
Other
Eligibility
18 Years to 30 Years · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
Ithaca, New York
Source: ClinicalTrials.gov public record
Updated Mar 14, 2014 · Synced Oct 19, 2026, 10:27 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Randomized, Placebo-Controlled Study of an Herbal Tea to Support Lactation

NCT02190448
View directory record Official record
Conditions
Lactation
Interventions
study herbal tea, herbal placebo tea
Dietary Supplement
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jul 5, 2018 · Synced Oct 19, 2026, 10:27 AM EDT
Recruiting Phase 2Phase 3 Interventional

Choline and Iron Deficiency

NCT06527391
View directory record Official record
Conditions
Pediatric Iron Deficiency, Anemia
Interventions
choline bitartrate, placebo drug
Drug · Other
Lead sponsor
University of Minnesota
Other
Eligibility
5 Months to 7 Months
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 5, 2026 · Synced Oct 19, 2026, 10:27 AM EDT
Completed No phase listed Observational

Oxidative Stress and Hemodialysis Access Failure

NCT00410449
View directory record Official record
Conditions
End Stage Renal Disease, Hemodialysis
Interventions
Alpha tocopherol
Drug
Lead sponsor
National Institute of Environmental Health Sciences (NIEHS)
NIH
Eligibility
21 Years and older
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2004
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 6, 2015 · Synced Oct 19, 2026, 10:27 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Impact of Two Iron Formulations on Iron Biomarkers and Quality of Life

NCT07156526
View directory record Official record
Conditions
Iron Deficiencies
Interventions
Qualia Iron Version A, Qualia Iron Version B, Placebo
Dietary Supplement
Lead sponsor
Qualia Life Sciences
Industry
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Carlsbad, California
Source: ClinicalTrials.gov public record
Updated Oct 5, 2026 · Synced Oct 19, 2026, 10:27 AM EDT
Withdrawn Phase 3 Interventional

Efficacy of Coenzyme Q10 Supplementation on Multi-Organ Dysfunction in Severely Burned Patients

NCT03968640
View directory record Official record
Conditions
Multiple Organ Failure
Interventions
CoQ10, Placebo
Dietary Supplement
Lead sponsor
American Burn Association
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 20, 2023 · Synced Oct 19, 2026, 10:27 AM EDT
Not yet recruiting Phase 2 Interventional

HMB Plus Vitamin D to Preserve Muscle in Older Adults Starting Semaglutide

NCT07760948
View directory record Official record
Conditions
Type 2 Diabetes Mellitus (T2DM), Sarcopenia, Obesity, Muscle Loss, Older Adults
Interventions
Calcium-HMB Plus Vitamin D3, Matching placebo
Dietary Supplement · Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
65 Years to 85 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 28, 2026 · Synced Oct 19, 2026, 10:27 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

The Effects of Vitamin C on Acute-Exercise in Postmenopausal Females

NCT07109115
View directory record Official record
Conditions
Females, Males, Menopause, Sedentary, Healthy Participants
Interventions
Vitamin C (Ascorbic Acid)
Dietary Supplement
Lead sponsor
University of Virginia
Other
Eligibility
45 Years and older
Enrollment
1 participant
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Jul 17, 2026 · Synced Oct 19, 2026, 10:27 AM EDT
Recruiting Phase 4 Interventional

Optimizing Portal Hypertension With TIPS and Interval Metabolic Surgery for Advanced Liver Disease

NCT07058155
View directory record Official record
Conditions
Liver Cirrhoses, Portal Hypertension Related to Cirrhosis, Severe Obesity, TIPS
Interventions
Transjugular Intrahepatic Portosystemic Shunt (TIPS), Sleeve Gastrectomy, Anti-Obesity Pharmacotherapy (Class Effect), Lifestyle Counseling - Diet & Physical-Activity Program
Procedure · Drug · Behavioral
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years to 70 Years
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2034
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 23, 2025 · Synced Oct 19, 2026, 10:27 AM EDT
Completed Not applicable Interventional

A Randomized Trial of Vitamin D Supplementation With or Without Vitamin A in Stem Cell Transplantation

NCT03202849
View directory record Official record
Conditions
Hematopoietic Stem Cell Transplant
Interventions
Vitamin D and A, Vitamin D and Placebo
Dietary Supplement
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
Not listed
Enrollment
83 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated May 12, 2023 · Synced Oct 19, 2026, 10:27 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Randomized Trial: Maternal Vitamin D Supplementation to Prevent Childhood Asthma (VDAART)

NCT00920621
View directory record Official record
Conditions
Asthma
Interventions
Vitamin D 3 cholecalciferol, Vitamin D3
Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 39 Years · Female only
Enrollment
876 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2023
U.S. locations
3
States / cities
San Diego, California • Boston, Massachusetts • St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated May 12, 2026 · Synced Oct 19, 2026, 10:27 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Efficacy of Oral Mitoquinone (MitoQ) Supplementation for Improving Physiological in Middle-aged and Older Adults

NCT02597023
View directory record Official record
Conditions
Aging
Interventions
MitoQ, Placebo
Drug
Lead sponsor
University of Colorado, Boulder
Other
Eligibility
60 Years to 79 Years
Enrollment
55 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Boulder, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 12, 2018 · Synced Oct 19, 2026, 10:27 AM EDT