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ClinicalTrials.gov public records Last synced Oct 2, 2026, 11:30 AM EDT

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Showing 73–96 of 963 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Vitamin D-3 Clear all
Completed Not applicable Interventional Results available

Vitamin D Supplementation Reduces Renin-Angiotensin System Activity in Obesity

NCT01068418
View directory record Official record
Conditions
Obesity, Vitamin D Deficiency, Hypertension
Interventions
Vitamin D (cholecalciferol)
Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 64 Years
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 30, 2017 · Synced Oct 2, 2026, 11:30 AM EDT
Terminated Phase 1Phase 2 Interventional Results available

Ph I/II of Vitamin D on Bone Mineral Density & Markers of Bone Resorption

NCT00904423
View directory record Official record
Conditions
Breast Cancer, Bone Diseases
Interventions
Vitamin D
Drug
Lead sponsor
Mark Pegram
Other
Eligibility
18 Years to 85 Years · Female only
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Feb 14, 2017 · Synced Oct 2, 2026, 11:30 AM EDT
Not yet recruiting Not applicable Interventional

Plasma Lipids-Dependent Vitamin E Metabolism During Dynamic Hyperlipidemia

NCT07715890
View directory record Official record
Conditions
Lipid Metabolism Disorders
Interventions
High fat liquid shake
Dietary Supplement
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
18 Years to 65 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 2, 2026 · Synced Oct 2, 2026, 11:30 AM EDT
Terminated No phase listed Observational

Asthma, Missed Immunizations, and Vitamin D Deficiency in Atopic Dermatitis

NCT01234909
View directory record Official record
Conditions
Atopic Dermatitis, Vitamin D Deficiency, Asthma
Interventions
Not listed
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
1 Year to 18 Years
Enrollment
98 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jun 1, 2015 · Synced Oct 2, 2026, 11:30 AM EDT
Completed Not applicable Interventional Results available

Improving Vitamin D Status in Home-bound Elders

NCT01410084
View directory record Official record
Conditions
Vitamin D Deficiency, Accidental Falls
Interventions
Vitamin D3, Vitamin E
Dietary Supplement
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
65 Years and older
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 9, 2019 · Synced Oct 2, 2026, 11:30 AM EDT
Terminated Early Phase 1 Interventional

Maintenance Dosing of Vitamin D in Crohn's Disease

NCT03615378
View directory record Official record
Conditions
Crohns Disease, Vitamin D Deficiency
Interventions
5000 IU D3, 1000 IU D3, Placebo
Dietary Supplement
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jul 24, 2019 · Synced Oct 2, 2026, 11:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Pharmacokinetics of a Single Large Dose of Vitamin D3

NCT00473239
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
cholecalciferol.
Drug
Lead sponsor
Creighton University
Other
Eligibility
19 Years and older
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2007
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated May 4, 2015 · Synced Oct 2, 2026, 11:30 AM EDT
Completed Not applicable Interventional

The Effects of Vitamin D on Glycemic Control and Proinflammatory Markers in Adolescents With T1DM

NCT01697228
View directory record Official record
Conditions
Type 1 Diabetes, Vitamin D Deficiency/Insufficiency
Interventions
Vitamin D
Dietary Supplement
Lead sponsor
Children's Hospital Los Angeles
Other
Eligibility
13 Years to 21 Years
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 8, 2017 · Synced Oct 2, 2026, 11:30 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

HMB Cerebral Palsy Pilot Study

NCT05384951
View directory record Official record
Conditions
Cerebral Palsy
Interventions
HMB + Vitamin D3
Dietary Supplement
Lead sponsor
Gillette Children's Specialty Healthcare
Other
Eligibility
13 Years to 17 Years
Enrollment
7 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Saint Paul, Minnesota
Source: ClinicalTrials.gov public record
Updated Feb 22, 2024 · Synced Oct 2, 2026, 11:30 AM EDT
Not listed Phase 4 Interventional

The Effect of Vitamin D Supplementation on Calcium Excretion in Thalassemia: a Dose Response Study

NCT01323608
View directory record Official record
Conditions
Thalassemia Major
Interventions
Vitamin D3, Placebo
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
6 Years to 60 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 19, 2011 · Synced Oct 2, 2026, 11:30 AM EDT
Terminated Phase 2 Interventional Results available

Calcitriol and Dexamethasone Before Radical Prostatectomy in Treating Patients With Localized Adenocarcinoma (Cancer) of the Prostate

NCT00084864
View directory record Official record
Conditions
Prostate Cancer
Interventions
calcitriol, dexamethasone, clinical observation
Dietary Supplement · Drug · Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years to 120 Years · Male only
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2010
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jun 12, 2017 · Synced Oct 2, 2026, 11:30 AM EDT
Withdrawn No phase listed Observational Accepts healthy volunteers

The Influence of Proton Pump Inhibitors (PPI's) on Blood Levels of 25-Hydroxyvitamin D.

NCT01302704
View directory record Official record
Conditions
Vitamin D
Interventions
Not listed
Lead sponsor
Mike O'Callaghan Military Hospital
Federal
Eligibility
18 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Nellis Air Force Base, Nevada
Source: ClinicalTrials.gov public record
Updated Nov 25, 2013 · Synced Oct 2, 2026, 11:30 AM EDT
Completed Not applicable Interventional

Effects of Oral Cholecalciferol (Vitamin D3) on Bone Health, Neuromuscular Function, and Quality of Life in Adults With Chronic Kidney Disease

NCT00511225
View directory record Official record
Conditions
End Stage Renal Disease
Interventions
cholecalciferol, placebo
Dietary Supplement
Lead sponsor
Creighton University
Other
Eligibility
19 Years and older
Enrollment
47 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Jul 3, 2012 · Synced Oct 2, 2026, 11:30 AM EDT
Completed Not applicable Interventional Results available

Cholecalciferol in Newly Diagnosed Non-Hodgkin Lymphoma or Chronic Lymphocytic Leukemia With Vitamin D Deficiency

NCT02553447
View directory record Official record
Conditions
Chronic Lymphocytic Leukemia, Non-Hodgkin Lymphoma, Untreated Chronic Lymphocytic Leukemia, Vitamin D Deficiency
Interventions
Cholecalciferol, Laboratory Biomarker Analysis
Dietary Supplement · Other
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older
Enrollment
197 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2025
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Apr 21, 2026 · Synced Oct 2, 2026, 11:30 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

The Effect of Vitamin D Statues on Endothelial Function

NCT01049048
View directory record Official record
Conditions
Cardiovascular Diseases, Vitamin D Deficiency
Interventions
Vitamin D3, Placebo
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
55 Years to 65 Years · Female only
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 5, 2015 · Synced Oct 2, 2026, 11:30 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

The Effect of a Meal on Vitamin D Absorption

NCT01268176
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
cholecalciferol
Dietary Supplement
Lead sponsor
Tufts University
Other
Eligibility
50 Years to 69 Years
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 13, 2013 · Synced Oct 2, 2026, 11:30 AM EDT
Terminated Phase 3 Interventional Accepts healthy volunteers Results available

Hydroxychloroquine as Post-Exposure Prophylaxis Against COVID-19 Infection

NCT04372017
View directory record Official record
Conditions
COVID-19, SARS-CoV 2
Interventions
Hydroxychloroquine, Vitamin D
Drug · Dietary Supplement
Lead sponsor
Sanford Health
Other
Eligibility
18 Years and older
Enrollment
1 participant
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Sioux Falls, South Dakota
Source: ClinicalTrials.gov public record
Updated Dec 10, 2021 · Synced Oct 2, 2026, 11:30 AM EDT
Completed Phase 2 Interventional Results available

Vitamin D3 for Aromatase Inhibitor Induced Arthralgias

NCT00867217
View directory record Official record
Conditions
Breast Cancer
Interventions
High Dose Vitamin D, Placebo, Standard Dose Vitamin D3, Letrozole 2.5mg
Dietary Supplement · Drug
Lead sponsor
Qamar Khan
Other
Eligibility
18 Years and older · Female only
Enrollment
160 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
2
States / cities
Westwood, Kansas • Wichita, Kansas
Source: ClinicalTrials.gov public record
Updated Feb 9, 2018 · Synced Oct 2, 2026, 11:30 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Clearance of 25-hydroxyvitamin D in Cystic Fibrosis

NCT03104855
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
d6-25-hydroxyvitamin D3
Drug
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2023
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Oct 12, 2023 · Synced Oct 2, 2026, 11:30 AM EDT
Completed Not applicable Interventional Results available

Vascular Reactivity in Chronic Kidney Disease (CKD) Patients Receiving Paricalcitol Versus Placebo

NCT00915876
View directory record Official record
Conditions
Chronic Kidney Disease
Interventions
Paricalcitol, Placebo
Drug
Lead sponsor
Amy Barton Pai
Other
Eligibility
18 Years and older
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Albany, New York
Source: ClinicalTrials.gov public record
Updated Dec 2, 2016 · Synced Oct 2, 2026, 11:30 AM EDT
Completed Phase 1 Interventional

Acute Effects of Canagliflozin, a Sodium Glucose Co-Transporter 2 (SGLT2) Inhibitor on Bone Metabolism in Healthy Volunteers

NCT02404870
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Placebo, Canagliflozin
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years and older
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 4, 2025 · Synced Oct 2, 2026, 11:30 AM EDT
Completed Not applicable Interventional Results available

The VALIDATE-D Study

NCT01635062
View directory record Official record
Conditions
Type 2 Diabetes, Obesity
Interventions
Calcitriol, Placebo
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 70 Years
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 11, 2017 · Synced Oct 2, 2026, 11:30 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Environmental Influences on Vitamin D Status

NCT00780247
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Not listed
Lead sponsor
Creighton University
Other
Eligibility
18 Years to 60 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Anchorage, Alaska
Source: ClinicalTrials.gov public record
Updated Oct 27, 2008 · Synced Oct 2, 2026, 11:30 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Nutrition and Body Composition in Acute Lymphoblastic Leukemia

NCT01317940
View directory record Official record
Conditions
Precursor Cell Lymphoblastic Leukemia-Lymphoma, Vitamin D Deficiency
Interventions
Vitamin D and Calcium Citrate
Dietary Supplement
Lead sponsor
Children's Hospital Los Angeles
Other
Eligibility
10 Years to 29 Years
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2016
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jul 8, 2020 · Synced Oct 2, 2026, 11:30 AM EDT