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Showing 1–24 of 45 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Vitamin D2 Placebo Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Consumption of Post-harvest UV-B Treated Mushrooms on Vitamin D Status of Healthy Adults

NCT01443897
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
1,000 IU vitamin D2, placebo capsule, mushrooms, UVB-treated mushrooms, 400 IU vitamin D2, UVB-treated mushrooms, 1,000 IU vitamin D2
Dietary Supplement · Other
Lead sponsor
USDA, Western Human Nutrition Research Center
Federal
Eligibility
20 Years to 59 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Sep 29, 2011 · Synced Sep 21, 2026, 1:48 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Is Treatment of Vitamin D Deficiency Associated With Resolution of Statin-Induced Muscular Symptoms

NCT01568255
View directory record Official record
Conditions
Myopathic Symptoms
Interventions
Ergocalciferol, Placebo
Drug
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years and older · Female only
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2019
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jun 9, 2021 · Synced Sep 21, 2026, 1:48 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Vitamin D to ENhance TraUma REcovery

NCT05458024
View directory record Official record
Conditions
Musculoskeletal Pain
Interventions
Vitamin D 2, Vitamin D2 Placebo
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 65 Years
Enrollment
71 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
4
States / cities
Worcester, Massachusetts • St Louis, Missouri • Camden, New Jersey + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 27, 2025 · Synced Sep 21, 2026, 1:48 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 13, 2016 · Synced Sep 21, 2026, 1:48 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Availability of Vitamin D in Orange Juice

NCT01778114
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D2 in orange juice, Vitamin D3 in orange juice, Vitamin D2, Vitamin D3, Placebo
Dietary Supplement · Other
Lead sponsor
Boston University
Other
Eligibility
18 Years and older
Enrollment
86 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2007
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 28, 2017 · Synced Sep 21, 2026, 1:48 AM EDT
Completed Not applicable Interventional

Vitamin D Administration in the Nursing Home

NCT00204919
View directory record Official record
Conditions
Vitamin D Deficiency, Osteoporosis
Interventions
Vitamin D, placebo
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
55 Years and older
Enrollment
96 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2004
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 3, 2023 · Synced Sep 21, 2026, 1:48 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Vitamin D for Painful Nocturnal Leg Cramps

NCT00715429
View directory record Official record
Conditions
Leg Cramps, Nocturnal
Interventions
vitamin d, placebo
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
50 Years and older
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2011
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Sep 16, 2019 · Synced Sep 21, 2026, 1:48 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 8, 2013 · Synced Sep 21, 2026, 1:48 AM EDT
Suspended Phase 1Phase 2 Interventional

Vitamin D and Bone Homeostasis in Ortho Polytrauma Patients

NCT03066817
View directory record Official record
Conditions
Vitamin D Deficiency, Polytrauma, Orthopedic Disorder
Interventions
Ergocalciferol 8000 IU/ML Oral Liquid [DRISDOL], Propylene Glycol
Drug
Lead sponsor
New York City Health and Hospitals Corporation
Other
Eligibility
18 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Apr 3, 2019 · Synced Sep 21, 2026, 1:48 AM EDT
Completed Phase 4 Interventional Results available

Safety and Effects of Supplementation With Ergocalciferol on Erythropoietin Dosing in Hemodialysis Patients

NCT01395823
View directory record Official record
Conditions
End Stage Renal Disease
Interventions
ergocalciferol supplementation, placebo
Dietary Supplement · Other
Lead sponsor
Dialysis Clinic, Inc.
Industry
Eligibility
18 Years and older
Enrollment
470 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
12
States / cities
Redding, California • Albany, Georgia • Shreveport, Louisiana + 9 more
Source: ClinicalTrials.gov public record
Updated Mar 13, 2016 · Synced Sep 21, 2026, 1:48 AM EDT
Completed Not applicable Interventional Results available

Effect of Vitamin D Supplementation on Inflammation and Cardiometabolic Risk Factors in Obese Adolescents

NCT01217840
View directory record Official record
Conditions
Obesity
Interventions
Drisdol (Ergocalciferol) Vitamin D2, Placebo
Drug
Lead sponsor
Stanford University
Other
Eligibility
11 Years to 17 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Nov 28, 2017 · Synced Sep 21, 2026, 1:48 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Vitamin D Deficiency, Insulin Resistance and FGF-23

NCT00491322
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Ergocalciferol, Ergocalciferol placebo
Dietary Supplement
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 45 Years
Enrollment
92 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2008
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 1, 2018 · Synced Sep 21, 2026, 1:48 AM EDT
Completed Phase 4 Interventional Results available

Wheezing in Black Preterm Infants: Impact of Vitamin D Supplementation Strategy

NCT01601847
View directory record Official record
Conditions
Wheezing, Allergy
Interventions
Cholecalciferol, Cholecalciferol
Dietary Supplement · Drug
Lead sponsor
Case Western Reserve University
Other
Eligibility
Up to 1 Year
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
5
States / cities
New York, New York • Cleveland, Ohio • Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jun 7, 2018 · Synced Sep 21, 2026, 1:48 AM EDT
Completed Phase 1 Interventional

Ergocalciferol Therapy in Calcidiol Deficient, Hemodialysis Patients on Therapeutic Doses of Paricalcitol

NCT02011828
View directory record Official record
Conditions
Inflammation, Insulin Resistance
Interventions
Ergocalciferol, Placebo
Drug
Lead sponsor
University of Utah
Other
Eligibility
18 Years and older
Enrollment
58 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Aug 10, 2016 · Synced Sep 21, 2026, 1:48 AM EDT
Completed Not applicable Interventional Results available

DIVINE: Dialysis Infection and Vitamin D In New England

NCT00892099
View directory record Official record
Conditions
End Stage Renal Disease
Interventions
Ergocalciferol, Placebo
Drug · Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
105 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
3
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 19, 2018 · Synced Sep 21, 2026, 1:48 AM EDT
Completed Phase 2 Interventional

Immune Mechanisms of Vitamin D to Reduce Chronic Pain After Burn

NCT05619289
View directory record Official record
Conditions
Burn Injury, Chronic Pain
Interventions
Ergocalciferol, Placebo
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 70 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Sep 21, 2026, 1:48 AM EDT
Completed Phase 3 Interventional Results available

Zoledronate in Preventing Skeletal (Bone)-Related Events in Men Who Are Receiving Androgen Deprivation Therapy For Prostate Cancer and Bone Metastases

NCT00079001
View directory record Official record
Conditions
Metastatic Cancer, Prostate Cancer
Interventions
zoledronic acid, placebo, androgen deprivation therapy, GnRH agonist, Calcium supplement, Vitamin D
Drug · Other · Dietary Supplement
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
18 Years and older · Male only
Enrollment
645 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2014
U.S. locations
238
States / cities
Mobile, Alabama • Fort Smith, Arkansas • Little Rock, Arkansas + 159 more
Source: ClinicalTrials.gov public record
Updated May 11, 2020 · Synced Sep 21, 2026, 1:48 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Study of Vitamin D and Uric Acid Lowering on Kidney and Blood Vessel Function

NCT01320722
View directory record Official record
Conditions
Renal Function, Endothelial Function, Blood Pressure, Overweight, Obesity
Interventions
Vitamin D ergocalciferol, Probenecid, Allopurinol, Placebo
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 75 Years
Enrollment
242 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2015
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 28, 2017 · Synced Sep 21, 2026, 1:48 AM EDT
Completed Not applicable Interventional Results available

Treatment of Hypovitaminosis D in Rheumatoid Arthritis

NCT00423358
View directory record Official record
Conditions
Rheumatoid Arthritis, Hypovitaminosis D
Interventions
Vitamin D, placebo
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 90 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2009
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Aug 23, 2015 · Synced Sep 21, 2026, 1:48 AM EDT
Terminated Phase 4 Interventional

Sustainability of Vitamin D Levels After Repletion With Ergocalciferol In Chronic Kidney Disease Stage 5D

NCT01312441
View directory record Official record
Conditions
Vitamin D Deficiency, Renal Failure Chronic Requiring Hemodialysis
Interventions
Ergocalciferol, Placebo
Drug
Lead sponsor
Albany College of Pharmacy and Health Sciences
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
4
States / cities
Albany, New York • Clifton Park, New York • Saratoga Springs, New York + 1 more
Source: ClinicalTrials.gov public record
Updated Jan 13, 2016 · Synced Sep 21, 2026, 1:48 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Clinical Approaches to Correcting Vitamin D Inadequacy and Maintaining Adequacy

NCT00692120
View directory record Official record
Conditions
Vitamin D Inadequacy, Vitamin D Deficiency
Interventions
Cholecalciferol (vitamin D3), Ergocalciferol (vitamin D2), Placebo
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
65 Years and older
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 4, 2015 · Synced Sep 21, 2026, 1:48 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D Deficiency in Adolescent Girls

NCT01180946
View directory record Official record
Conditions
Healthy, Vitamin D Deficiency
Interventions
ergocalciferol, placebo pill
Dietary Supplement · Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
9 Years to 18 Years · Female only
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 4, 2013 · Synced Sep 21, 2026, 1:48 AM EDT
Completed Not applicable Interventional Results available

D Vitamin Intervention in VA

NCT01375660
View directory record Official record
Conditions
Impaired Fasting Glucose, Impaired Glucose Tolerance, Vitamin D Insufficiency
Interventions
Placebo, 50K vitamin D2
Drug
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
35 Years to 85 Years · Male only
Enrollment
205 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 5, 2015 · Synced Sep 21, 2026, 1:48 AM EDT
Terminated Phase 2 Interventional

Study of Docetaxel With Doxercalciferol or Placebo for Advanced Prostate Cancer

NCT00582582
View directory record Official record
Conditions
Prostate Cancer
Interventions
Docetaxel plus doxercalciferol, Docetaxel plus placebo
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older · Male only
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2007
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 12, 2019 · Synced Sep 21, 2026, 1:48 AM EDT