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ClinicalTrials.gov public records Last synced Oct 14, 2026, 3:39 AM EDT

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Showing 193–216 of 553 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Vitamin D3, Cholecalciferol Clear all
Completed Not applicable Interventional Accepts healthy volunteers Results available

To Study the Nutri-Genomic Response of Vit-D Supplementation in African-Americans

NCT02802449
View directory record Official record
Conditions
Hypovitaminosis D
Interventions
25 Hydroxy- Vitamin D3 [25 (OH) D3], Placebo
Drug
Lead sponsor
Charles Drew University of Medicine and Science
Other
Eligibility
18 Years to 70 Years
Enrollment
330 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Feb 15, 2019 · Synced Oct 14, 2026, 3:39 AM EDT
Terminated Phase 4 Interventional

Clinical Effects of Vitamin D Repletion in Patients With Parkinson's Disease

NCT00571285
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Vitamin D3, Vitamin D3 - high dose, Placebo
Dietary Supplement
Lead sponsor
Emory University
Other
Eligibility
18 Years to 89 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2015
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 24, 2017 · Synced Oct 14, 2026, 3:39 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D, Diet and Activity Study

NCT01240213
View directory record Official record
Conditions
Breast Cancer, Obesity, Hypovitaminosis D
Interventions
Vitamin D, Placebo
Dietary Supplement
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
50 Years to 75 Years · Female only
Enrollment
218 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Aug 7, 2013 · Synced Oct 14, 2026, 3:39 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Melatonin-Micronutrients for Osteopenia Treatment Study

NCT01870115
View directory record Official record
Conditions
Osteoporosis, Osteopenia
Interventions
Fiber Pill, Melatonin, Strontium citrate, Vitamins D3 and K2
Dietary Supplement
Lead sponsor
Duquesne University
Other
Eligibility
Female only
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2017
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 14, 2018 · Synced Oct 14, 2026, 3:39 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Resveratrol for the Prevention of Bone Loss in Postmenopausal Women

NCT06250283
View directory record Official record
Conditions
Low Bone Mass
Interventions
Resveratrol, Placebo
Dietary Supplement
Lead sponsor
University of Delaware
Other
Eligibility
Female only
Enrollment
52 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Newark, Delaware
Source: ClinicalTrials.gov public record
Updated May 13, 2026 · Synced Oct 14, 2026, 3:39 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Vitamin Supplementation After Bariatric Surgery

NCT02686905
View directory record Official record
Conditions
Complications of Bariatric Procedures, Avitaminosis
Interventions
Chewable Multivitamin with Iron, PatchMD Vitamin D3/Calcium Patch, PatchMD Multivitamin Patch, PatchMD B12 Energy Plus Patch, Chewable Calcium, Quick Dissolve B12
Dietary Supplement
Lead sponsor
California State Polytechnic University, Pomona
Other
Eligibility
18 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Brea, California
Source: ClinicalTrials.gov public record
Updated Sep 30, 2016 · Synced Oct 14, 2026, 3:39 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Vitamin D Deficiency and Vitamin D Supplementation on Glucose Metabolism

NCT00749918
View directory record Official record
Conditions
Prediabetes, Vitamin D Deficiency
Interventions
Cholecalciferol (vitamin D3)
Dietary Supplement
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 65 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 20, 2008 · Synced Oct 14, 2026, 3:39 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D and Muscle Metabolic Function

NCT02221596
View directory record Official record
Conditions
Healthy
Interventions
vitamin D, aerobic training
Dietary Supplement · Other
Lead sponsor
David Travis Thomas
Other
Eligibility
60 Years and older
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2018
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Mar 15, 2018 · Synced Oct 14, 2026, 3:39 AM EDT
Completed Not applicable Interventional

Correlative Analysis of the Genomics of Vitamin D and Omega-3 Fatty Acid Intake in Prostate Cancer

NCT03290417
View directory record Official record
Conditions
Prostate Cancer
Interventions
Vitamin D, Omega-3, Turmeric
Dietary Supplement
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
Male only
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 18, 2020 · Synced Oct 14, 2026, 3:39 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Analysis of Response of Subjects With Atopic Dermatitis or Psoriasis to Oral Vitamin D3

NCT00789880
View directory record Official record
Conditions
Atopic Dermatitis, Psoriasis
Interventions
Vitamin D3, Placebo
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 70 Years
Enrollment
82 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
3
States / cities
San Diego, California • Denver, Colorado • Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Apr 12, 2017 · Synced Oct 14, 2026, 3:39 AM EDT
Terminated Phase 3 Interventional

The ENERGY 3 Study: Evaluation of Efficacy and Safety of INZ-701 in Children With ENPP1 Deficiency

NCT06046820
View directory record Official record
Conditions
Ectonucleotide Pyrophosphatase/Phosphodiesterase1 Deficiency, Autosomal Recessive Hypophosphatemic Rickets, Generalized Arterial Calcification of Infancy
Interventions
INZ-701, Control Arm (Conventional Therapy)
Drug
Lead sponsor
Inozyme Pharma
Industry
Eligibility
1 Year to 12 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
3
States / cities
Chicago, Illinois • Philadelphia, Pennsylvania • Fort Worth, Texas
Source: ClinicalTrials.gov public record
Updated Oct 1, 2026 · Synced Oct 14, 2026, 3:39 AM 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 Oct 14, 2026, 3:39 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Effectiveness of Vitamin D Supplementation

NCT02513823
View directory record Official record
Conditions
Elevated Blood Pressure, Endothelial Dysfunction
Interventions
2,000 International Units (IU)of vitamin D3
Dietary Supplement
Lead sponsor
Texas Woman's University
Other
Eligibility
18 Years and older · Female only
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Oct 4, 2019 · Synced Oct 14, 2026, 3:39 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D Needs of Early Adolescent Children

NCT00931580
View directory record Official record
Conditions
Healthy
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
University of Georgia
Other
Eligibility
9 Years to 13 Years
Enrollment
323 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
3
States / cities
Athens, Georgia • Indianapolis, Indiana • West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Sep 25, 2015 · Synced Oct 14, 2026, 3:39 AM EDT
Not listed Phase 4 Interventional

Vitamin D Augmentation of Tekturna (Aliskiren) in Hypertension

NCT01472796
View directory record Official record
Conditions
Hypertension
Interventions
Vitamin D (cholecalciferol), Tekturna(Aliskiren) plus placebo
Dietary Supplement · Drug
Lead sponsor
Wayne State University
Other
Eligibility
30 Years to 74 Years
Enrollment
92 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Nov 16, 2011 · Synced Oct 14, 2026, 3:39 AM EDT
Completed Phase 1 Interventional Results available

Vitamin D Supplementation in Crohn's Patients

NCT00742781
View directory record Official record
Conditions
Inflammatory Bowel Disease
Interventions
Vitamin D
Dietary Supplement
Lead sponsor
Penn State University
Other
Eligibility
18 Years to 70 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
2
States / cities
Hershey, Pennsylvania • University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 26, 2013 · Synced Oct 14, 2026, 3:39 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 14, 2026, 3:39 AM EDT
Completed Phase 2 Interventional

Calcitriol and Docetaxel in Treating Patients With Metastatic or Locally Advanced Pancreatic Cancer

NCT00238199
View directory record Official record
Conditions
Pancreatic Cancer
Interventions
calcitriol, docetaxel
Dietary Supplement · Drug
Lead sponsor
OHSU Knight Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2006
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Apr 24, 2015 · Synced Oct 14, 2026, 3:39 AM EDT
Completed Phase 2 Interventional

Vitamin D3 Supplementation in Participants Diagnosed With Early-Stage Prostate Cancer Who Decide to Undergo Active Surveillance Treatment Regimen.

NCT01045109
View directory record Official record
Conditions
Prostate Cancer
Interventions
cholecalciferol
Dietary Supplement
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 90 Years · Male only
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jul 18, 2018 · Synced Oct 14, 2026, 3:39 AM EDT
Terminated Phase 1Phase 2 Interventional Results available

Phase I/II Calcitriol in Lung Cancer

NCT00794547
View directory record Official record
Conditions
Non Small Cell Lung Cancer
Interventions
Calcitriol
Drug
Lead sponsor
University of Michigan Rogel Cancer Center
Other
Eligibility
18 Years and older
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2013
U.S. locations
4
States / cities
Ann Arbor, Michigan • Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Dec 12, 2017 · Synced Oct 14, 2026, 3:39 AM EDT
Terminated Phase 2 Interventional Results available

High-Dose Cholecalciferol in Treating Patients Receiving Combination Chemotherapy and Bevacizumab as First-Line Therapy For Metastatic Colorectal Cancer

NCT01198548
View directory record Official record
Conditions
Stage IV Colon Cancer, Stage IV Rectal Cancer
Interventions
leucovorin calcium, bevacizumab, cholecalciferol, fluorouracil, oxaliplatin, pharmacological study
Drug · Biological · Dietary Supplement + 1 more
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years to 79 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jul 21, 2014 · Synced Oct 14, 2026, 3:39 AM EDT
Terminated Phase 4 Interventional Results available

Trial of High Dose Vitamin D in Patient's With Crohn's Disease

NCT02208310
View directory record Official record
Conditions
Crohn's Disease, Vitamin D Deficiency
Interventions
Cholecalciferol 10,000 IU, Cholecalciferol 400 IU
Drug
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 75 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
4
States / cities
Indianapolis, Indiana • Iowa City, Iowa • Ann Arbor, Michigan + 1 more
Source: ClinicalTrials.gov public record
Updated Oct 6, 2017 · Synced Oct 14, 2026, 3:39 AM EDT
Completed Not applicable Interventional Results available

Calcitriol in Preventing Lung Cancer in Smokers and Former Smokers at High Risk of Lung Cancer

NCT00690924
View directory record Official record
Conditions
Lung Cancer, Precancerous Condition, Tobacco Use Disorder
Interventions
calcitriol, laboratory biomarker analysis, pharmacological study
Drug · Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
40 Years to 79 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2018
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jun 4, 2018 · Synced Oct 14, 2026, 3:39 AM EDT
Completed Phase 2 Interventional

Vitamin D to Slow Progression of Knee Osteoarthritis

NCT00306774
View directory record Official record
Conditions
Osteoarthritis, Knee
Interventions
Vitamin D (cholecalciferol), Placebo
Dietary Supplement
Lead sponsor
Tufts Medical Center
Other
Eligibility
45 Years to 90 Years
Enrollment
146 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 23, 2011 · Synced Oct 14, 2026, 3:39 AM EDT