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ClinicalTrials.gov public records Last synced Oct 23, 2026, 1:21 AM EDT

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Showing 1–24 of 961 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: cholecalciferol. Clear all
Withdrawn Phase 2 Interventional

Vitamin D Deficiency Causes Immune Dysfunction and Enables or Perpetuates the Development of Rheumatoid Arthritis

NCT00279461
View directory record Official record
Conditions
Arthritis, Rheumatoid, Vitamin D Deficiency
Interventions
Placebo in arm A and Vitamin D in arm B, vitamin D 3 for arm A ,and matching placebo for arm B
Drug
Lead sponsor
Indiana University
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Aug 4, 2015 · Synced Oct 23, 2026, 1:21 AM EDT
Completed Phase 2 Interventional Results available

Vitamin D to Improve Endothelial Function in SLE

NCT01911169
View directory record Official record
Conditions
Atherosclerosis, Systemic Lupus Erythematosus
Interventions
Cholecalciferol
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 80 Years
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Oct 27, 2017 · Synced Oct 23, 2026, 1:21 AM EDT
Completed Phase 2 Interventional

Calcitriol and Dexamethasone in Treating Patients With Prostate Cancer Who Have Undergone Surgery or Radiation Therapy

NCT00054522
View directory record Official record
Conditions
Prostate Cancer
Interventions
calcitriol, dexamethasone
Dietary Supplement · Drug
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years and older · Male only
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2006
U.S. locations
2
States / cities
Buffalo, New York • Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 8, 2011 · Synced Oct 23, 2026, 1:21 AM EDT
Completed Phase 4 Interventional

Comparison of Absorption of Vitamin D in Cystic Fibrosis

NCT01880346
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Vitamin D Powder, Vitamin D Oil
Dietary Supplement
Lead sponsor
Emory University
Other
Eligibility
18 Years to 59 Years
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Nov 20, 2015 · Synced Oct 23, 2026, 1:21 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 2, 2018 · Synced Oct 23, 2026, 1:21 AM EDT
Completed Phase 2 Interventional

Phase II Randomized Study of Alendronate Sodium for Osteopenia in Patients With Gaucher's Disease

NCT00004488
View directory record Official record
Conditions
Gaucher's Disease, Osteopenia
Interventions
alendronate sodium, calcium carbonate, cholecalciferol
Drug
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
18 Years to 50 Years
Enrollment
82 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2002
U.S. locations
2
States / cities
Cincinnati, Ohio • Dayton, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 25, 2015 · Synced Oct 23, 2026, 1:21 AM EDT
Completed Phase 2 Interventional Results available

High Dose Vitamin D and Calcium for Bone Health in Individuals Initiating HAART

NCT01403051
View directory record Official record
Conditions
HIV-1 Infection
Interventions
EFV/FTC/TDF, Calcium Carbonate, Vitamin D3, Placebo for calcium carbonate, Placebo for vitamin D3
Drug
Lead sponsor
Advancing Clinical Therapeutics Globally for HIV/AIDS and Other Infections
Network
Eligibility
18 Years and older
Enrollment
167 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
38
States / cities
Birmingham, Alabama • Los Angeles, California • Palo Alto, California + 27 more
Source: ClinicalTrials.gov public record
Updated Oct 12, 2018 · Synced Oct 23, 2026, 1:21 AM EDT
Completed Not applicable Interventional Results available

Effect of Vitamin D on the Honeymoon Period in Children and Adolescents With Type 1 Diabetes

NCT01724190
View directory record Official record
Conditions
Type 1 Diabetes
Interventions
Vitamin D, Placebo
Drug
Lead sponsor
Nationwide Children's Hospital
Other
Eligibility
4 Years to 18 Years
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 28, 2024 · Synced Oct 23, 2026, 1:21 AM EDT
Terminated Phase 3 Interventional Results available

Pediatric Chronic Kidney Disease Safety and Efficacy

NCT01277510
View directory record Official record
Conditions
Chronic Kidney Disease, Hyperparathyroidism, Hyperparathyroidism, Secondary, Kidney Disease, Secondary Hyperparathyroidism
Interventions
cinacalcet capsule, placebo, Standard of Care
Drug
Lead sponsor
Amgen
Industry
Eligibility
6 Years to 17 Years
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2011
U.S. locations
18
States / cities
Birmingham, Alabama • Los Angeles, California • San Francisco, California + 14 more
Source: ClinicalTrials.gov public record
Updated Jun 29, 2020 · Synced Oct 23, 2026, 1:21 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 23, 2026, 1:21 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Does Vitamin C Increase the Body Heat Generated By The Nervous System?

NCT07341308
View directory record Official record
Conditions
Metabolism Changes, Vitamin D
Interventions
Vitamin C
Other
Lead sponsor
Colorado State University
Other
Eligibility
18 Years to 40 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 2, 2026 · Synced Oct 23, 2026, 1:21 AM EDT
Terminated Phase 4 Interventional Results available

Mothers' Own Milk Optimization for Preterm Infants Project (MoMO PIP) Pilot Study

NCT04629534
View directory record Official record
Conditions
Vitamin D Deficiency, Nutritional Deficiency
Interventions
High dose Cholecalciferol, Cholecalciferol
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
0 Days to 45 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Mar 15, 2023 · Synced Oct 23, 2026, 1:21 AM EDT
Completed Not applicable Interventional

Vitamin D for Muscle Metabolic Function in Cancer Cachexia

NCT03144128
View directory record Official record
Conditions
Cancer Cachexia, Vitamin D Deficiency
Interventions
Vitamin D, Placebo
Dietary Supplement
Lead sponsor
David Travis Thomas
Other
Eligibility
45 Years to 75 Years
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Oct 14, 2020 · Synced Oct 23, 2026, 1:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Solius UV Light Source in Improving Serum Levels of 25-hydroxyvitamin D

NCT04865432
View directory record Official record
Conditions
Vitamin D Deficiency, Vitamin D Insufficiency
Interventions
UVB treatment
Device
Lead sponsor
Boston University
Other
Eligibility
22 Years and older
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 23, 2022 · Synced Oct 23, 2026, 1:21 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Acute Vitamin D Supplementation on Testosterone in Females

NCT06610968
View directory record Official record
Conditions
Female Hormone Profile
Interventions
Vitamin D (Cholecalciferol ), Placebo Group
Dietary Supplement
Lead sponsor
University of Southern California
Other
Eligibility
18 Years to 35 Years · Female only
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 25, 2026 · Synced Oct 23, 2026, 1:21 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

BioEnergetics and Metabolomics in Cystic Fibrosis

NCT02225899
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Not listed
Lead sponsor
Emory University
Other
Eligibility
18 Years to 50 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2018
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Nov 29, 2019 · Synced Oct 23, 2026, 1:21 AM EDT
Withdrawn Phase 2 Interventional

Targeted Vitamin D Treatment of Schizophrenia-Associated Hyperprolinemia

NCT02197286
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder
Interventions
Cholecalciferol, Placebo
Drug
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2015
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 12, 2015 · Synced Oct 23, 2026, 1:21 AM EDT
Suspended No phase listed Observational Accepts healthy volunteers

Skin Characteristics of Parents of Food Allergic Pediatric Patients

NCT04198753
View directory record Official record
Conditions
Food Allergy in Children
Interventions
Skin tape stripping, Skin barrier assessment, Blood draw
Diagnostic Test · Device
Lead sponsor
National Jewish Health
Other
Eligibility
18 Years and older
Enrollment
160 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 13, 2020 · Synced Oct 23, 2026, 1:21 AM EDT
Completed Not applicable Interventional Results available

Ultraviolet Light And Vitamin D In Subjects With Fat Malabsorption Or After Gastric Bypass Surgery

NCT01910792
View directory record Official record
Conditions
Vitamin D Deficiency, Gastrointestinal Diseases
Interventions
Sperti Lamp
Device
Lead sponsor
Boston University
Other
Eligibility
18 Years to 64 Years
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 11, 2017 · Synced Oct 23, 2026, 1:21 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 23, 2026, 1:21 AM EDT
Not listed Phase 3 Interventional Accepts healthy volunteers

Effects of Vitamin D and Omega-3 Supplementation on Telomeres in VITAL

NCT04386577
View directory record Official record
Conditions
Aging
Interventions
Vitamin D3 (cholecalciferol), fish oil
Dietary Supplement · Drug
Lead sponsor
Augusta University
Other
Eligibility
50 Years and older
Enrollment
1,054 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2021
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated May 13, 2020 · Synced Oct 23, 2026, 1:21 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Vitamin D Supplementation in RNA-seq Profiles of Single-core Prostate Samples, Among Veterans

NCT04621500
View directory record Official record
Conditions
Prostate Cancer, Vitamin D Deficiency, Stress Reaction
Interventions
cholecalciferol, Standard of Care Prostate Biopsy - collection of 13th core for RNA-seq, Standard of Care Prostate Biopsies at baseline and after one year vitamin D3 supplementation, Allostatic Load
Drug · Procedure · Diagnostic Test
Lead sponsor
Medical University of South Carolina
Other
Eligibility
50 Years to 75 Years · Male only
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jul 4, 2025 · Synced Oct 23, 2026, 1:21 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Metabolic Syndrome and Insulin Resistance at Allina

NCT01545830
View directory record Official record
Conditions
Metabolic Syndrome
Interventions
vitamin D3 (cholecalciferol)
Dietary Supplement
Lead sponsor
Allina Health System
Other
Eligibility
18 Years and older
Enrollment
84 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 1, 2016 · Synced Oct 23, 2026, 1:21 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 23, 2026, 1:21 AM EDT