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ClinicalTrials.gov public records Last synced Oct 1, 2026, 7:23 AM EDT

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Showing 1–24 of 63 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Vitamin D3 4000 IU Clear all
Completed Phase 2 Interventional Results available

Study of Vitamin D in Untreated Metastatic Colorectal Cancer

NCT01516216
View directory record Official record
Conditions
Metastatic Colorectal Cancer
Interventions
FOLFOX + bevacizumab, Vitamin D
Drug · Dietary Supplement
Lead sponsor
Dana-Farber Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
139 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2019
U.S. locations
18
States / cities
Boise, Idaho • Fruitland, Idaho • Meridian, Idaho + 13 more
Source: ClinicalTrials.gov public record
Updated Apr 26, 2022 · Synced Oct 1, 2026, 7:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Personalized Vitamin D Supplementation in European and African Americans

NCT02362269
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
Female only
Enrollment
169 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
2
States / cities
Madison, Wisconsin • Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 1, 2020 · Synced Oct 1, 2026, 7:23 AM EDT
Completed Not applicable Interventional

A Pilot Study of the Impact of Vitamin D3 on Muscle Performance in Elderly Women

NCT00986596
View directory record Official record
Conditions
Sarcopenia, Falls
Interventions
vitamin D3, Placebo
Dietary Supplement
Lead sponsor
Tufts University
Other
Eligibility
65 Years and older · Female only
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2011
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 10, 2012 · Synced Oct 1, 2026, 7:23 AM EDT
Completed Not applicable Interventional

Vitamin D, Cardiovascular Disease, and African Americans

NCT01655810
View directory record Official record
Conditions
Vitamin D Deficiency, Type 2 Diabetes Mellitus, Cardiovascular Disease
Interventions
Vitamin D3, Calcium carbonate
Dietary Supplement
Lead sponsor
Washington University School of Medicine
Other
Eligibility
50 Years to 70 Years
Enrollment
86 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2018
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 5, 2020 · Synced Oct 1, 2026, 7:23 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 1, 2026, 7:23 AM EDT
Completed Phase 2 Interventional Results available

Study of Vitamin D and Effect on Heart Disease and Insulin Resistance

NCT01093417
View directory record Official record
Conditions
Human Immunodeficiency Virus (HIV), Vitamin D Deficiency, HIV Infections
Interventions
Vitamin D, Placebo
Drug · Other
Lead sponsor
University Hospitals Cleveland Medical Center
Other
Eligibility
18 Years and older
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 14, 2016 · Synced Oct 1, 2026, 7:23 AM EDT
Completed Phase 1 Interventional Results available

Vitamin D and Severe Asthma Exacerbations

NCT01921894
View directory record Official record
Conditions
Asthma
Interventions
Cholecalciferol
Dietary Supplement
Lead sponsor
University of Pittsburgh
Other
Eligibility
6 Years to 14 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 23, 2017 · Synced Oct 1, 2026, 7:23 AM EDT
Completed Phase 4 Interventional

The Role of Vitamin D in Immune Function in Patients With Chronic Kidney Disease (CKD) Stages 3 and 4.

NCT00749736
View directory record Official record
Conditions
Chronic Kidney Disease
Interventions
cholecalciferol, doxercalciferol, placebo
Dietary Supplement
Lead sponsor
Indiana University
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Mar 29, 2013 · Synced Oct 1, 2026, 7:23 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 1, 2026, 7:23 AM EDT
Completed Not applicable Interventional Results available

Cholecalciferol Versus Doxercalciferol in the Treatment of Secondary Hyperparathyroidism in Chronic Kidney Disease

NCT00285467
View directory record Official record
Conditions
Renal Osteodystrophy
Interventions
doxercalciferol, Cholecalciferol
Drug
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 82 Years
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated May 2, 2016 · Synced Oct 1, 2026, 7:23 AM EDT
Completed Not applicable Interventional

Bioavailability and Biological Effects of Vitamin D2 Contained in Mushroom

NCT01488734
View directory record Official record
Conditions
Vitamin D Deficiency, Metabolic Syndrome, Prediabetes
Interventions
Mushroom with 600 IU vitamin D2, Mushroom with 4000 IU Vitamin D2, 600 IU Vitamin D3 and untreated mushroom, 4000 IU Vitamin D3 and untreated mushroom, Placebo
Dietary Supplement · Drug
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
30 Years to 90 Years
Enrollment
47 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 14, 2017 · Synced Oct 1, 2026, 7:23 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Vitamin D in Vulnerable Adults (VIVA-VA)

NCT01170273
View directory record Official record
Conditions
Frail Elderly, Vitamin d Deficiency
Interventions
vitamin D, placebo
Dietary Supplement
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
65 Years to 95 Years · Male only
Enrollment
130 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Dec 21, 2016 · Synced Oct 1, 2026, 7:23 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Evaluation of Vitamin D Requirements During Pregnancy

NCT00292591
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
cholecalciferol (vitamin D3), cholecalciferol
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
16 Years to 45 Years · Female only
Enrollment
501 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2010
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Sep 19, 2016 · Synced Oct 1, 2026, 7:23 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effect of Vitamin D Supplementation on Muscle Mass and Function

NCT01199926
View directory record Official record
Conditions
Obesity, Insulin Resistance, Inflammation
Interventions
Vitamin D, Placebo
Dietary Supplement · Drug
Lead sponsor
Purdue University
Other
Eligibility
18 Years to 35 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated May 15, 2015 · Synced Oct 1, 2026, 7:23 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Vitamin D, Glucose Control and Insulin Sensitivity in African-Americans

NCT00784511
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
cholecalciferol, microcrystalline cellulose
Dietary Supplement · Other
Lead sponsor
Tufts University
Other
Eligibility
40 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 14, 2014 · Synced Oct 1, 2026, 7:23 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 1, 2026, 7:23 AM EDT
Completed Not applicable Interventional Results available

Vitamin D and Type 2 Diabetes Study

NCT01942694
View directory record Official record
Conditions
Prediabetes, Type 2 Diabetes
Interventions
Vitamin D (Cholecalciferol), Placebo
Dietary Supplement · Other
Lead sponsor
Tufts Medical Center
Other
Eligibility
30 Years and older
Enrollment
2,423 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
25
States / cities
Phoenix, Arizona • Los Angeles, California • Palo Alto, California + 20 more
Source: ClinicalTrials.gov public record
Updated Aug 16, 2022 · Synced Oct 1, 2026, 7:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D2, Muscle Damage, NASCAR Pitcrew

NCT01825616
View directory record Official record
Conditions
Muscle Function, Muscle Soreness, Vitamin D Status
Interventions
Vitamin D2 mushroom powder, Placebo
Dietary Supplement · Other
Lead sponsor
Appalachian State University
Other
Eligibility
20 Years to 40 Years · Male only
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
3
States / cities
Kannapolis, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 9, 2013 · Synced Oct 1, 2026, 7:23 AM EDT
Completed Phase 2 Interventional Results available

Vitamin D and Prostate Cancer: A Clinical Study Enrolling Subjects Undergoing Prostatectomy

NCT02726113
View directory record Official record
Conditions
Prostate Cancer
Interventions
cholecalciferol, placebo
Drug · Other
Lead sponsor
Medical University of South Carolina
Other
Eligibility
19 Years to 90 Years · Male only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
2
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Dec 3, 2019 · Synced Oct 1, 2026, 7:23 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 1, 2026, 7:23 AM EDT
Not listed Phase 4 Interventional Accepts healthy volunteers

A Randomized Control Trial of Vitamin D Prophylaxis in the Prevention of Hypertensive Disorders of Pregnancy

NCT02920593
View directory record Official record
Conditions
Gestational Hypertension, Toxemia, Superimposed Preeclampsia, Eclampsia, HELLP Syndrome
Interventions
Vitamin D3
Drug
Lead sponsor
Stony Brook University
Other
Eligibility
18 Years and older · Female only
Enrollment
412 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Stony Brook, New York
Source: ClinicalTrials.gov public record
Updated Oct 5, 2017 · Synced Oct 1, 2026, 7:23 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 1, 2026, 7:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Can Vitamin D Reduce the Burden of COVID-19?

NCT07128069
View directory record Official record
Conditions
COVID-19
Interventions
Vitamin D 400IU, Vitamin D 4000IU
Dietary Supplement
Lead sponsor
University of Chicago
Other
Eligibility
18 Years and older
Enrollment
2,093 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 7, 2026 · Synced Oct 1, 2026, 7:23 AM EDT
Completed Not applicable Interventional Results available

Impact of Vitamin D on Diabetic Kidney Disease in African Americans

NCT01214356
View directory record Official record
Conditions
Diabetic Kidney Disease
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years and older
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Oct 16, 2018 · Synced Oct 1, 2026, 7:23 AM EDT