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ClinicalTrials.gov public records Last synced Oct 2, 2026, 2:27 AM EDT

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Showing 25–48 of 91 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Vitamin D3 2000 IU Clear all
Completed Phase 3 Interventional

Supplementation With Vitamin D, Calcium or Both on Calcium Absorption and Bone Mineral Content in Children With JRA

NCT00570934
View directory record Official record
Conditions
Juvenile Rheumatoid Arthritis
Interventions
Cholecalciferol, Calcium, Calcium and cholecalciferol, Placebo
Dietary Supplement · Drug
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
3 Years to 15 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1995 – 2002
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 10, 2016 · Synced Oct 2, 2026, 2:27 AM EDT
Completed Not applicable Interventional

Supplementation of Vitamin D3 in Patients With Inflammatory Bowel Diseases and Hypovitaminosis D

NCT01877577
View directory record Official record
Conditions
Crohn's Disease (CD), Ulcerative Colitis (UC)
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Fresno, California
Source: ClinicalTrials.gov public record
Updated Jul 2, 2014 · Synced Oct 2, 2026, 2:27 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Vitamin D HIV Study on Postmenopausal Women

NCT01375010
View directory record Official record
Conditions
HIV
Interventions
Vitamin D3, Placebo, Vitamin Supplements
Drug · Other
Lead sponsor
Columbia University
Other
Eligibility
40 Years to 70 Years · Female only
Enrollment
85 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 7, 2019 · Synced Oct 2, 2026, 2:27 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Nutritional Intervention for Age-related Muscular Function and Strength Losses

NCT00874575
View directory record Official record
Conditions
Muscle Strength, Sarcopenia
Interventions
Placebo, Vitamin D, Beta-hydroxy-Beta-methylbutyrate, Beta-hydroxy-Beta-methylbutyrate and Vitamin D
Dietary Supplement · Drug
Lead sponsor
Metabolic Technologies Inc.
Industry
Eligibility
60 Years and older
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2013
U.S. locations
2
States / cities
Ames, Iowa • Brookings, South Dakota
Source: ClinicalTrials.gov public record
Updated Sep 17, 2014 · Synced Oct 2, 2026, 2:27 AM EDT
Active, not recruiting Phase 3 Interventional Accepts healthy volunteers Results available

Vitamin D and Omega-3 Trial (VITAL)

NCT01169259
View directory record Official record
Conditions
Cancer, Cardiovascular Disease
Interventions
vitamin D3, omega-3 fatty acids (fish oil), Vitamin D3 placebo, Fish oil placebo
Dietary Supplement · Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
25,871 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 30, 2026 · Synced Oct 2, 2026, 2:27 AM EDT
Completed Phase 2 Interventional Results available

Vitamin D Dose Finding Study

NCT01092338
View directory record Official record
Conditions
HIV Infections, AIDS
Interventions
Cholecalciferol (Vit D3)
Drug
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
5 Years to 24 Years
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 18, 2013 · Synced Oct 2, 2026, 2:27 AM EDT
Not listed Not applicable Interventional

The Effect of Vitamin D Repletion in Patients With Hepatocellular Carcinoma on the Orthotopic Liver Transplant List

NCT01575717
View directory record Official record
Conditions
Vitamin D Deficiency, Hepatocellular Carcinoma
Interventions
Vitamin D3 4000 IU, Vitamin D3 2000 IU
Drug
Lead sponsor
Andrea Branch
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 24, 2012 · Synced Oct 2, 2026, 2:27 AM EDT
Completed Not applicable Interventional Results available

Optimizing Vitamin D in the Elderly

NCT01554241
View directory record Official record
Conditions
Deficiency of Vitamin D3
Interventions
D3 2000 IU/day, D3 4000 IU/day, D3 50,000 IU weekly, vitamin D3 800 IU/day
Dietary Supplement
Lead sponsor
University of California, San Francisco
Other
Eligibility
65 Years and older
Enrollment
86 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Feb 18, 2015 · Synced Oct 2, 2026, 2:27 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Vitamin D and Marine Omega-3 Fatty Acids on Anemia

NCT01632761
View directory record Official record
Conditions
Anemia
Interventions
Vitamin D3 ., omega-3 fatty acids (fish oil), Vitamin D3 placebo, Fish oil placebo
Dietary Supplement · Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
2,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 21, 2025 · Synced Oct 2, 2026, 2:27 AM EDT
Completed Phase 2Phase 3 Interventional Results available

Randomized Controlled Trial of Vitamin D3 in Diabetic Kidney Disease

NCT00552409
View directory record Official record
Conditions
Diabetes Mellitus, Chronic Kidney Disease, Diabetic Kidney Disease
Interventions
Cholecalciferol, Placebo
Dietary Supplement
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Apr 28, 2014 · Synced Oct 2, 2026, 2:27 AM EDT
Completed Not applicable Interventional

Vitamin D to Improve Glucose Metabolism and Reduce Inflammation in Obese Adolescents

NCT00994396
View directory record Official record
Conditions
Obesity, Glucose Intolerance, Inflammation
Interventions
Placebo, Vitamin D 3 cholecalciferol
Dietary Supplement
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
9 Years to 19 Years
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 6, 2016 · Synced Oct 2, 2026, 2:27 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Vitamin D and Omega-3 Hypertension Trial (VITAL Hypertension)

NCT01653678
View directory record Official record
Conditions
Hypertension
Interventions
Vitamin D-3 (cholecalciferol), 2000 IU, Omega-3 fatty acids (fish oil), Vitamin D placebo, Fish oil placebo
Dietary Supplement · Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years to 99 Years
Enrollment
25,875 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 18, 2025 · Synced Oct 2, 2026, 2:27 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers Results available

Age-related Macular Degeneration (AMD) in the Vitamin D and Omega-3 Trial (VITAL)

NCT01782352
View directory record Official record
Conditions
Age-related Macular Degeneration
Interventions
Omega-3 fatty acids (fish oil), Vitamin D3, Vitamin D3 placebo, Fish oil placebo
Drug · Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
25,871 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 8, 2023 · Synced Oct 2, 2026, 2:27 AM EDT
Terminated Phase 2 Interventional Results available

Vitamin D and n-3 Polyunsaturated Fatty Acids (PUFAs) to Prevent Chronic Pain Following Major Thermal Burn Injury

NCT03313076
View directory record Official record
Conditions
Chronic Pain Following Thermal Burn Injury
Interventions
Omega-3 fatty acids (fish oil), Vitamin D3 (cholecalciferol), Vitamin D3 (cholecalciferol) placebo, Omega-3 fatty acid placebo
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 65 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated May 8, 2026 · Synced Oct 2, 2026, 2:27 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

VITamin D and OmegA-3 TriaL (VITAL): Fractures, Vitamin D and Genetic Markers

NCT01704859
View directory record Official record
Conditions
Fractures
Interventions
Vitamin D3 placebo, Fish oil placebo, omega-3 fatty acids (fish oil), Vitamin D3
Dietary Supplement · Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
25,871 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 27, 2026 · Synced Oct 2, 2026, 2:27 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Vitamin D Supplementation and Metabolism in Vitamin D Deficient Elderly

NCT01145703
View directory record Official record
Conditions
Vitamin D Deficiency, Metabolic Syndrome
Interventions
RDA Vitamin D3 only, Vitamin D2/3 Repletion only, Vitamin D2/3 Repletion + AEX, Vitamin D2/3 Repletion + RT
Dietary Supplement · Other
Lead sponsor
Baltimore VA Medical Center
Federal
Eligibility
40 Years to 85 Years
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 5, 2014 · Synced Oct 2, 2026, 2:27 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers Results available

LungVITamin D and OmegA-3 Trial (lungVITAL)

NCT01728571
View directory record Official record
Conditions
COPD, Asthma, Pulmonary Function, Pneumonia
Interventions
Vitamin D3, fish oil, Vitamin D3 placebo, Fish oil placebo
Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
25,871 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 7, 2026 · Synced Oct 2, 2026, 2:27 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

VITamin D and OmegA-3 TriaL: Effects on Mammographic Density and Breast Tissue

NCT02239874
View directory record Official record
Conditions
Benign Breast Disease
Interventions
Vitamin D and fish oil placebo, Fish oil and vitamin D placebo, Vitamin D placebo and fish oil placebo, Vitamin D and fish oil
Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
55 Years to 67 Years · Female only
Enrollment
3,894 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2023
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 7, 2022 · Synced Oct 2, 2026, 2:27 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers

Clinical Trial of Vitamin D3 to Reduce Cancer Risk in Postmenopausal Women

NCT01052051
View directory record Official record
Conditions
Cancer
Interventions
Vitamin D3, Calcium carbonate
Dietary Supplement
Lead sponsor
Creighton University
Other
Eligibility
55 Years and older · Female only
Enrollment
2,303 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2015
U.S. locations
1
States / cities
Fremont, Nebraska
Source: ClinicalTrials.gov public record
Updated Jul 24, 2019 · Synced Oct 2, 2026, 2:27 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D Supplement Study for Adolescents

NCT00909454
View directory record Official record
Conditions
Vitamin D Deficiency, Overweight, Obesity
Interventions
2000 IU Vitamin D3 daily supplement, 400 IU Vitamin D3 supplement
Dietary Supplement
Lead sponsor
Augusta University
Other
Eligibility
14 Years to 19 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Oct 17, 2011 · Synced Oct 2, 2026, 2:27 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Vitamin D and Vascular Health in Children

NCT01797302
View directory record Official record
Conditions
Obesity, Vitamin D Deficiency
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
University of Pittsburgh
Other
Eligibility
10 Years to 18 Years
Enrollment
225 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 24, 2020 · Synced Oct 2, 2026, 2:27 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Vitamin D Status of Pregnant Women and Their Children in Eau Claire, South Carolina

NCT00412087
View directory record Official record
Conditions
Vitamin D Deficiency, Pregnancy
Interventions
cholecalciferol (vitamin D3), cholecalciferol
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
16 Years to 45 Years · Female only
Enrollment
564 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Columbia, South Carolina
Source: ClinicalTrials.gov public record
Updated Jul 29, 2016 · Synced Oct 2, 2026, 2:27 AM EDT
Active, not recruiting Phase 3 Interventional Accepts healthy volunteers

VITAL Rhythm Study

NCT02178410
View directory record Official record
Conditions
Cardiovascular Disease
Interventions
Vitamin D3, Omega-3 fatty acids (fish oil), Fish oil placebo, Vitamin D3 placebo
Dietary Supplement · Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
25,119 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 7, 2025 · Synced Oct 2, 2026, 2:27 AM EDT
Completed Phase 1 Interventional

Vitamin D Therapy in Patients With Systemic Lupus Erythematosus (SLE)

NCT00418587
View directory record Official record
Conditions
Systemic Lupus Erythematosus
Interventions
Cholecalciferol
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 85 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2014
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jun 18, 2018 · Synced Oct 2, 2026, 2:27 AM EDT