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ClinicalTrials.gov public records Last synced Sep 30, 2026, 11:51 PM EDT

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Showing 25–48 of 91 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: 2000 IU vitamin D3 Clear all
Terminated Not applicable Interventional Accepts healthy volunteers Results available

PUSH Plus Protein Pilot for Hip Fracture Patients

NCT03410823
View directory record Official record
Conditions
Hip Fracture
Interventions
PUSH, Protein, Nutrition
Behavioral · Dietary Supplement
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
60 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
2
States / cities
Baltimore, Maryland • Towson, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 26, 2024 · Synced Sep 30, 2026, 11:51 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D Status Impacts Inflammation and Risk of Infections During Pregnancy

NCT01815047
View directory record Official record
Conditions
Inflammation, Infection
Interventions
Vitamin D3 Supplementation
Dietary Supplement
Lead sponsor
Cornell University
Other
Eligibility
13 Years to 18 Years · Female only
Enrollment
85 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2019
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Oct 28, 2019 · Synced Sep 30, 2026, 11:51 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Improving the Understanding of the Response to Vitamin D Supplementation

NCT01465178
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
cholecalciferol, Placebo
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
50 Years to 100 Years · Female only
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Nov 25, 2016 · Synced Sep 30, 2026, 11:51 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Safety of Vitamin D Supplementation in Older Persons

NCT00681590
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
cholecalciferol (vitamin D)
Dietary Supplement
Lead sponsor
University of Miami
Other
Eligibility
65 Years to 95 Years
Enrollment
105 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jan 26, 2017 · Synced Sep 30, 2026, 11:51 PM EDT
Completed Not applicable Interventional Results available

Vitamin D and Omega-3 Trial to Prevent and Treat Diabetic Kidney Disease

NCT01684722
View directory record Official record
Conditions
Diabetes
Interventions
Vitamin D, Omega-3 fatty acids (fish oil), Vitamin D placebo, Fish oil placebo
Dietary Supplement · Drug
Lead sponsor
University of Washington
Other
Eligibility
50 Years and older
Enrollment
1,312 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2019
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 21, 2022 · Synced Sep 30, 2026, 11:51 PM 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 Sep 30, 2026, 11:51 PM EDT
Completed Not applicable Interventional

Effect of Vitamin D Supplementation on Hemoglobin A1c in Patients With Uncontrolled Type 2 Diabetes Mellitus

NCT00985361
View directory record Official record
Conditions
Type 2 Diabetes Mellitus
Interventions
Vitamin D3 2000 international units daily, Vitamin C 500mg daily
Dietary Supplement
Lead sponsor
ProMedica Health System
Other
Eligibility
21 Years to 75 Years
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
3
States / cities
Sylvania, Ohio • Toledo, Ohio
Source: ClinicalTrials.gov public record
Updated May 6, 2010 · Synced Sep 30, 2026, 11:51 PM EDT
Completed Not applicable Interventional Results available

Individualized Response to Vitamin D Treatment Study

NCT02925195
View directory record Official record
Conditions
Characteristics That Modify the Response to Cholecalciferol Treatment
Interventions
Vitamin D3, Placebo
Dietary Supplement · Drug
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
666 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
5
States / cities
Los Angeles, California • Evanston, Illinois • Baltimore, Maryland + 2 more
Source: ClinicalTrials.gov public record
Updated Nov 2, 2023 · Synced Sep 30, 2026, 11:51 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

VITamin D and OmegA-3 TriaL: Effects on Bone Structure and Architecture (VITAL)

NCT01747447
View directory record Official record
Conditions
Bone Density, Body Composition, Bone Health
Interventions
Vitamin D3 placebo, Fish oil placebo, omega-3 fatty acids (fish oil), Vitamin D3
Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
771 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2023
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 28, 2026 · Synced Sep 30, 2026, 11:51 PM 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 Sep 30, 2026, 11:51 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Improving Community Ambulation After Hip Fracture

NCT01783704
View directory record Official record
Conditions
Hip Fracture
Interventions
Nutrition, PUSH, PULSE
Dietary Supplement · Behavioral
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
60 Years and older
Enrollment
210 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2017
U.S. locations
4
States / cities
Farmington, Connecticut • Baltimore, Maryland • Lebanon, New Hampshire + 1 more
Source: ClinicalTrials.gov public record
Updated Jan 27, 2022 · Synced Sep 30, 2026, 11:51 PM EDT
Completed Not applicable Interventional

Efficacy of Vitamin D Supplementation in Obese Children

NCT02956408
View directory record Official record
Conditions
Obesity, Pediatric, Obesity, Childhood, Obesity, Morbid, Vitamin D Deficiency
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Columbia University
Other
Eligibility
5 Years to 11 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 5, 2020 · Synced Sep 30, 2026, 11:51 PM 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 Sep 30, 2026, 11:51 PM EDT
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 Sep 30, 2026, 11:51 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D Supplementation in Warfighters

NCT02954549
View directory record Official record
Conditions
Vitamin D Deficiency Disease
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Madigan Army Medical Center
Federal
Eligibility
18 Years and older
Enrollment
131 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated May 10, 2019 · Synced Sep 30, 2026, 11:51 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Effect Of Vitamin D On Measures Of Bone Health And Gene Expression

NCT01696409
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
400 IU vitamin D3, 2000 IU vitamin D3
Dietary Supplement
Lead sponsor
Boston University
Other
Eligibility
18 Years to 70 Years
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 4, 2017 · Synced Sep 30, 2026, 11:51 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Effect of Vitamin D3 Supplementation on Insulin Resistance and Cardiovascular Risk Factors in Obese Adolescents

NCT00858247
View directory record Official record
Conditions
Obesity
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Mayo Clinic
Other
Eligibility
12 Years to 18 Years
Enrollment
51 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 20, 2014 · Synced Sep 30, 2026, 11:51 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

A Large Randomized Trial of Vitamin D, Omega-3 Fatty Acids and Cognitive Decline

NCT01669915
View directory record Official record
Conditions
Cognitive Decline
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
60 Years to 92 Years
Enrollment
3,424 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2021
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 21, 2023 · Synced Sep 30, 2026, 11:51 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Study of Vitamin D and Omega-3 Supplementation for Preventing Diabetes

NCT01633177
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Vitamin D3, Omega-3 fatty acid (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
22,220 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 3, 2026 · Synced Sep 30, 2026, 11:51 PM EDT
Terminated Phase 4 Interventional Results available

Vitamin D Supplementation for Treatment of Heart Failure

NCT01230307
View directory record Official record
Conditions
Heart Failure
Interventions
Vitamin D3, Placebo
Drug
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Nov 18, 2016 · Synced Sep 30, 2026, 11:51 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Independent and Combined Effects of Resistance Exercise Training and β-hydroxy β-methylbutyrate Plus Vitamin D

NCT03848741
View directory record Official record
Conditions
Aging, Skeletal Muscle
Interventions
Non-Exercise Control, Resistance Exercise Training, Placebo, HMB+VitD
Behavioral · Dietary Supplement
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
45 Years to 60 Years · Female only
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 17, 2019 · Synced Sep 30, 2026, 11:51 PM EDT
Completed Phase 1Phase 2 Interventional

Vitamin D Deficiency and Replacement on Pulmonary and Endocrine Function in SCI

NCT02099955
View directory record Official record
Conditions
Spinal Cord Injury, Vitamin D Deficiency
Interventions
Vitamin D3
Drug
Lead sponsor
James J. Peters Veterans Affairs Medical Center
Federal
Eligibility
18 Years to 75 Years
Enrollment
88 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Mar 7, 2017 · Synced Sep 30, 2026, 11:51 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluating Vitamin D Content in Mushrooms

NCT01815437
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Mushroom Vitamin D2, Cholecalciferol, Vitamin D2 - Ergocalciferol, Mushroom Extract
Dietary Supplement
Lead sponsor
Boston University
Other
Eligibility
18 Years to 64 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 27, 2017 · Synced Sep 30, 2026, 11:51 PM EDT
Completed Phase 3 Interventional Results available

Vitamin D and Arterial Function in Patients With Chronic Kidney Disease

NCT01384539
View directory record Official record
Conditions
Arterial Dysfunction, Chronic Kidney Disease
Interventions
Cholecalciferol, Calcitriol
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 80 Years
Enrollment
128 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Sep 28, 2018 · Synced Sep 30, 2026, 11:51 PM EDT