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ClinicalTrials.gov public records Last synced Oct 10, 2026, 11:47 AM EDT

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Showing 145–168 of 959 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: cholecalciferol (vitamin D3) Clear all
Completed Phase 1 Interventional Accepts healthy volunteers

Vitamin D Levels in the Skin of Healthy Subjects After Oral Supplementation

NCT01447355
View directory record Official record
Conditions
Healthy, no Evidence of Disease, Skin Cancer
Interventions
cholecalciferol
Drug
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
40 Years and older
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Oct 8, 2014 · Synced Oct 10, 2026, 11:47 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Evaluation of a Transdermal Vitamin D3 Delivery System, D3forME

NCT02174718
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Transdermal D Patch, Oral vitamin D3, Placebo patch, Oral placebo
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 85 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Nov 2, 2018 · Synced Oct 10, 2026, 11:47 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Vascular Function, Insulin Sensitivity, and Vitamin D

NCT01041547
View directory record Official record
Conditions
Insulin Sensitivity, Flow-mediated Dilation, Arterial Stiffness
Interventions
Not listed
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
19 Years to 60 Years
Enrollment
63 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2013
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jan 14, 2014 · Synced Oct 10, 2026, 11:47 AM EDT
Completed Not applicable Interventional Results available

Treatment of Vitamin D Deficiency in Patients With Rheumatoid Arthritis

NCT01426347
View directory record Official record
Conditions
Rheumatoid Arthritis, Vitamin D Deficiency
Interventions
Placebo sugar pill, Ergocalciferol
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 75 Years
Enrollment
139 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 20, 2017 · Synced Oct 10, 2026, 11:47 AM EDT
Completed Phase 2 Interventional Results available

Daily Vitamin D for Sickle-cell Respiratory Complications

NCT04170348
View directory record Official record
Conditions
Sickle Cell Disease, Anemia, Sickle Cell, Anemia, Hemolytic, Congenital, Respiratory Tract Diseases, Respiration Disorders, Acute Chest Syndrome, Lung Diseases, Asthma, Respiratory Tract Infections, Nutrition Disorders, Deficiency Diseases Vitamin, Vitamin D Deficiency
Interventions
Daily oral vitamin D3, 3,333 IU, Monthly oral vitamin D3, 100,000 IU, Placebo oral tablet
Drug
Lead sponsor
Columbia University
Other
Eligibility
3 Years to 20 Years
Enrollment
58 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 24, 2025 · Synced Oct 10, 2026, 11:47 AM EDT
Completed No phase listed Observational

A Study of 25-hydroxy Vitamin d Levels in Non-itching Hemodialysis Patients

NCT01548716
View directory record Official record
Conditions
Vitamin D Deficiency, End Stage Renal Disease
Interventions
Not listed
Lead sponsor
Winthrop University Hospital
Other
Eligibility
18 Years to 85 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
2
States / cities
Mineola, New York
Source: ClinicalTrials.gov public record
Updated Mar 8, 2012 · Synced Oct 10, 2026, 11:47 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Vitamin D Binding Protein (Gc) Allele Variation Effects Response to Vitamin D Treatment

NCT00650780
View directory record Official record
Conditions
Vitamin D Status
Interventions
Not listed
Lead sponsor
Creighton University
Other
Eligibility
19 Years to 90 Years
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Apr 2, 2008 · Synced Oct 10, 2026, 11:47 AM EDT
Completed Phase 3 Interventional Results available

Safety and Efficacy of CTAP101 to Treat Secondary Hyperparathyroidism in Stage 3 or 4 CKD and Vitamin D Insufficiency

NCT01704079
View directory record Official record
Conditions
Chronic Kidney Disease, Hyperparathyroidism, Secondary, Vitamin D Deficiency
Interventions
CTAP101 30 μg capsules, Sugar pill to CTAP101 30 μg capsules
Drug · Other
Lead sponsor
OPKO IP Holdings II, Inc.
Industry
Eligibility
18 Years and older
Enrollment
216 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Bannockburn, Illinois
Source: ClinicalTrials.gov public record
Updated Jan 13, 2025 · Synced Oct 10, 2026, 11:47 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Pharmacokinetics of Vitamin D in Multiple Sclerosis and in Health

NCT01667796
View directory record Official record
Conditions
Multiple Sclerosis, Relapsing-remitting
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 60 Years · Female only
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
2
States / cities
San Francisco, California • Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 5, 2019 · Synced Oct 10, 2026, 11:47 AM EDT
Completed Not applicable Interventional

Vitamin D Supplementation in Older Women

NCT00472823
View directory record Official record
Conditions
Osteoporosis, Aging
Interventions
Vitamin D3, Calcium Citrate (Citracal)
Dietary Supplement
Lead sponsor
Creighton University
Other
Eligibility
57 Years and older · Female only
Enrollment
273 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Mar 14, 2016 · Synced Oct 10, 2026, 11:47 AM EDT
Completed Not applicable Interventional

Transplant Wellness Clinic for Elderly or High Risk Patients Undergoing BMT

NCT04194840
View directory record Official record
Conditions
Stem Cell Transplant Complications, Myeloma, Lymphoma, Allogeneic and Autologous Stem Cell Transplant
Interventions
physical therapy consult, Cognitive Assessment, Cancer Aging Research Group (CARG) assessment, Medication Review, Nutrition assessment, Laboratory studies, Patient satisfaction questionnaire, Physician Questionnaire, Patient follow-up questionnaire
Other
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
Not listed
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 5, 2025 · Synced Oct 10, 2026, 11:47 AM EDT
Completed No phase listed Observational

Impact of Monthly High Dose Oral Cholecalciferol on Serum 25 Hydroxy Vitamin D Levels in Bariatric Surgery Subjects

NCT01871389
View directory record Official record
Conditions
Bariatric Surgery
Interventions
Not listed
Lead sponsor
Texas Tech University
Other
Eligibility
18 Years to 60 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated May 9, 2014 · Synced Oct 10, 2026, 11:47 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Vitamin D3 Supplementation for Vitamin D Deficiency in Rotator Cuff Repair Surgery

NCT05009498
View directory record Official record
Conditions
Vitamin D Deficiency, Rotator Cuff Tears
Interventions
Vitamin D3 supplementation, Placebo
Dietary Supplement · Other
Lead sponsor
Community Memorial Health System
Other
Eligibility
18 Years to 65 Years
Enrollment
240 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
2
States / cities
Ventura, California
Source: ClinicalTrials.gov public record
Updated Aug 17, 2021 · Synced Oct 10, 2026, 11:47 AM EDT
Not listed Phase 3 Interventional

High Dose Interval Vitamin D Supplementation in Patients With IBD Receiving Remicade

NCT03162432
View directory record Official record
Conditions
IBD, Ulcerative Colitis, Crohn Disease
Interventions
Vitamin D3
Drug
Lead sponsor
Boston Children's Hospital
Other
Eligibility
7 Years to 25 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2023
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 10, 2023 · Synced Oct 10, 2026, 11:47 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Sunweavers: Supporting Native American Women's Vitamin D Research

NCT01490333
View directory record Official record
Conditions
Vitamin D Deficiency, Cardiovascular Diseases
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
55 Years to 75 Years · Female only
Enrollment
99 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
3
States / cities
Bowler, Wisconsin • Lac du Flambeau, Wisconsin • Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Nov 20, 2014 · Synced Oct 10, 2026, 11:47 AM EDT
Completed Not applicable Interventional Results available

Cholecalciferol Supplement in Treating Patients With Localized Prostate Cancer Undergoing Observation

NCT00887432
View directory record Official record
Conditions
Prostate Adenocarcinoma
Interventions
Cholecalciferol, Laboratory Biomarker Analysis, Patient Observation, Placebo Administration, Quality-of-Life Assessment, Questionnaire Administration
Dietary Supplement · Other · Drug
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years and older · Male only
Enrollment
132 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2020
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Oct 26, 2021 · Synced Oct 10, 2026, 11:47 AM EDT
Completed No phase listed Observational

Vitamin D Levels in Subjects With Chronic Urticaria and Angioedema

NCT00876369
View directory record Official record
Conditions
Urticaria, Angioedema
Interventions
Not listed
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Sep 6, 2023 · Synced Oct 10, 2026, 11:47 AM EDT
Completed Phase 2 Interventional Results available

Randomized Controlled Trial of Calcitriol vs. Placebo Among Critically-ill Patients With Sepsis

NCT01689441
View directory record Official record
Conditions
Severe Sepsis or Septic Shock
Interventions
Calcitriol, Placebo
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 10, 2020 · Synced Oct 10, 2026, 11:47 AM EDT
Completed Early Phase 1 Interventional Results available

Calcitriol Monotherapy for X-Linked Hypophosphatemia

NCT03748966
View directory record Official record
Conditions
X-linked Hypophosphatemia, Hypophosphatemic Rickets, Hypophosphatemic Rickets, X-Linked Dominant
Interventions
Calcitriol
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
3 Years to 70 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 7, 2026 · Synced Oct 10, 2026, 11:47 AM EDT
Completed Phase 2 Interventional

Pharmacokinetic (PK) and Pharmacodynamic (PD) Study of CD 2027 Spray in Adults With Plaque-type Psoriasis

NCT00763503
View directory record Official record
Conditions
Plaque-type Psoriasis
Interventions
CD 2027
Drug
Lead sponsor
Galderma R&D
Industry
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
3
States / cities
Hot Springs, Arizona • Austin, Texas • Bryan, Texas
Source: ClinicalTrials.gov public record
Updated Feb 18, 2021 · Synced Oct 10, 2026, 11:47 AM EDT
Terminated Not applicable Interventional Results available

Stem Cell Recruitment in Osteoporosis Therapy

NCT01656629
View directory record Official record
Conditions
Low Bone Density
Interventions
Teriparatide, Alendronate, calcium and vitamin D
Drug · Dietary Supplement
Lead sponsor
Johns Hopkins University
Other
Eligibility
50 Years to 80 Years · Female only
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2020
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 21, 2020 · Synced Oct 10, 2026, 11:47 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Efficacy of Vitamin D Supplementation in Bariatric Surgery Patients

NCT01385098
View directory record Official record
Conditions
Obesity, Vitamin D Deficiency
Interventions
Vitamin D3 and Calcium
Dietary Supplement
Lead sponsor
Vadim Sherman, MD
Other
Eligibility
18 Years to 65 Years · Female only
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2015
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 23, 2018 · Synced Oct 10, 2026, 11:47 AM EDT
Terminated Early Phase 1 Interventional Results available

Vitamin D Supplementation in Women With DCIS and/or LCIS

NCT02936999
View directory record Official record
Conditions
Breast Cancer
Interventions
Cholecalciferol
Drug
Lead sponsor
Inova Health Care Services
Other
Eligibility
18 Years and older · Female only
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
Fairfax, Virginia
Source: ClinicalTrials.gov public record
Updated Dec 16, 2020 · Synced Oct 10, 2026, 11:47 AM EDT
Terminated Phase 2 Interventional Results available

Oral Calcitriol With Ketoconazole in CRPC

NCT03261336
View directory record Official record
Conditions
Castration-resistant Prostate Cancer
Interventions
Calcitriol, Ketoconazole, Hydrocortisone
Drug
Lead sponsor
Donald Trump, MD
Other
Eligibility
18 Years and older
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Fairfax, Virginia
Source: ClinicalTrials.gov public record
Updated Feb 8, 2021 · Synced Oct 10, 2026, 11:47 AM EDT