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ClinicalTrials.gov public records Last synced Oct 10, 2026, 12:39 PM EDT

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Showing 169–192 of 959 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: cholecalciferol (vitamin D3) Clear all
Completed Not applicable Interventional

Vitamin D Replacement Using Oral Thin Film (OTF) Cholecalciferol in Patients Undergoing Hematopoietic Stem Cell Transplantation

NCT04818957
View directory record Official record
Conditions
Vitamin D Deficiency, Hematopoietic Stem Cell Transplantation (HSCT)
Interventions
Oral Thin Film (OTF) Cholecalciferol (Vitamin D3)
Dietary Supplement
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
Not listed
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 2, 2023 · Synced Oct 10, 2026, 12:39 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Drug Metabolizing Enzyme and Transporter Function in Chronic Kidney Disease

NCT02360644
View directory record Official record
Conditions
Chronic Kidney Diseases, Deficiency, Vitamin D
Interventions
Cholecalciferol
Dietary Supplement
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 70 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2019
U.S. locations
2
States / cities
Aurora, Colorado • Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 30, 2021 · Synced Oct 10, 2026, 12:39 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Oklahoma Native American Women's Osteoporosis Screening Study

NCT01939470
View directory record Official record
Conditions
Osteoporosis
Interventions
Not listed
Lead sponsor
Oklahoma State University
Other
Eligibility
50 Years and older · Female only
Enrollment
301 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2011
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Mar 8, 2019 · Synced Oct 10, 2026, 12:39 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Vitamin D, Insulin Sensitivity, and Vascular Associations in Adolescents

NCT01041365
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
14 Years to 18 Years · Female only
Enrollment
62 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, 12:39 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Vitamin D Insufficiency in Man

NCT01848236
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D2, Vitamin D3
Dietary Supplement
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2020
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 3, 2020 · Synced Oct 10, 2026, 12:39 PM EDT
Completed Not applicable Interventional Results available

Prehabilitation of Veterans With Exercise and Nutrition

NCT04485611
View directory record Official record
Conditions
Frailty
Interventions
Supervised aerobic + resistance training and nutritional support
Behavioral
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
50 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 22, 2025 · Synced Oct 10, 2026, 12:39 PM EDT
Completed Phase 1 Interventional

Effect of CTAP101 Capsules on Ca/iPTH in Advanced Breast/Prostate Cancer Patients Treated With Denosumab/Zoledronic Acid

NCT02274623
View directory record Official record
Conditions
Breast Cancer, Prostate Cancer, Bone Neoplasms, Hypocalcemia, Hyperparathyroidism, Secondary
Interventions
CTAP101 Capsules
Drug
Lead sponsor
OPKO Health, Inc.
Industry
Eligibility
18 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
6
States / cities
Long Beach, California • Miami, Florida • Evergreen Park, Illinois + 3 more
Source: ClinicalTrials.gov public record
Updated Sep 27, 2019 · Synced Oct 10, 2026, 12:39 PM 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 10, 2026, 12:39 PM EDT
Completed Not applicable Interventional Results available

Vitamin D Supplementation on Cardiovascular Risk Factors

NCT01412710
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Cholecalciferol
Drug
Lead sponsor
Florida International University
Other
Eligibility
30 Years to 70 Years
Enrollment
92 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Dec 12, 2017 · Synced Oct 10, 2026, 12:39 PM EDT
Active, not recruiting Phase 3 Interventional

Efficacy and Safety of Encaleret Compared to Standard of Care in Participants With ADH1

NCT05680818
View directory record Official record
Conditions
Autosomal Dominant Hypocalcemia (ADH)
Interventions
Encaleret, Standard of Care
Drug · Dietary Supplement
Lead sponsor
Calcilytix Therapeutics, Inc., a BridgeBio company
Industry
Eligibility
16 Years and older
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2029
U.S. locations
11
States / cities
Oakland, California • Aurora, Colorado • Indianapolis, Indiana + 8 more
Source: ClinicalTrials.gov public record
Updated Jul 29, 2026 · Synced Oct 10, 2026, 12:39 PM EDT
Completed Phase 1Phase 2 Interventional

Vitamin D Deficiency and Replacement on Pulmonary and Endocrine Function in SCI

NCT02099955
View directory record Official record
Conditions
Spinal Cord Injury, Vitamin D Deficiency
Interventions
Vitamin D3
Drug
Lead sponsor
James J. Peters Veterans Affairs Medical Center
Federal
Eligibility
18 Years to 75 Years
Enrollment
88 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Mar 7, 2017 · Synced Oct 10, 2026, 12:39 PM EDT
Completed Not applicable Interventional

Efficacy of Vitamin D Supplementation in Obese Children

NCT02956408
View directory record Official record
Conditions
Obesity, Pediatric, Obesity, Childhood, Obesity, Morbid, Vitamin D Deficiency
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Columbia University
Other
Eligibility
5 Years to 11 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 5, 2020 · Synced Oct 10, 2026, 12:39 PM EDT
Completed Not applicable Interventional

Differential Effects of Ergocalciferol and Cholecalciferol Therapies in Chronic Kidney Disease

NCT01835691
View directory record Official record
Conditions
Chronic Kidney Disease
Interventions
Vitamin D2 (ergocalciferol), Vitamin D3 (cholecalciferol)
Dietary Supplement
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years and older
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Oct 19, 2017 · Synced Oct 10, 2026, 12:39 PM EDT
Completed Phase 2 Interventional Results available

Adding Phosphorus to Osteoporosis Drug Treatment

NCT00074711
View directory record Official record
Conditions
Osteoporosis, Osteopenia
Interventions
Calcium carbonate, Calcium Phosphate
Drug
Lead sponsor
Creighton University
Other
Eligibility
60 Years to 85 Years · Female only
Enrollment
241 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Jul 6, 2016 · Synced Oct 10, 2026, 12:39 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Vitamin D and Omega-3 Fatty Acids on Infectious Diseases and hCAP18 (VITAL Infection)

NCT01758081
View directory record Official record
Conditions
Infections, Human Cathelicidin Antimicrobial Peptide (hCAP-18)
Interventions
vitamin D3, omega-3 fatty acids (fish oil), Vitamin D3 placebo, fish oil placebo
Dietary Supplement · Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
25,874 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 25, 2025 · Synced Oct 10, 2026, 12:39 PM EDT
Terminated Not applicable Interventional Results available

Study of Adults With Low Growth Hormone Who Survived Childhood Cancer Where Treatment Caused Low Bone Density

NCT00145704
View directory record Official record
Conditions
Osteopenia
Interventions
bisphosphonate therapy (risedronate), Vitamin D supplement, Calcium
Drug · Dietary Supplement
Lead sponsor
State University of New York - Upstate Medical University
Other
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2008
U.S. locations
1
States / cities
Syracuse, New York
Source: ClinicalTrials.gov public record
Updated Apr 8, 2013 · Synced Oct 10, 2026, 12:39 PM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

"Clinical Trial to Determine the Efficacy of Vitamin D for Acne Therapy"

NCT01694433
View directory record Official record
Conditions
Acne Vulgaris
Interventions
Calcipotriene, Placebo
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
66 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 7, 2019 · Synced Oct 10, 2026, 12:39 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Vitamin D Supplementation in Healthy Adolescents

NCT01126671
View directory record Official record
Conditions
Vitamin D Supplementation
Interventions
Supplemental Vitamin D
Drug
Lead sponsor
Boston Children's Hospital
Other
Eligibility
11 Years to 18 Years
Enrollment
56 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 4, 2018 · Synced Oct 10, 2026, 12:39 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Effect of Vitamin D Repletion on Insulin Resistance and Systemic Inflammation

NCT01354964
View directory record Official record
Conditions
Insulin Resistance
Interventions
Vitamin D, Placebo
Drug
Lead sponsor
Albert Einstein College of Medicine
Other
Eligibility
21 Years to 75 Years
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2015
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Nov 2, 2020 · Synced Oct 10, 2026, 12:39 PM EDT
Completed Not applicable Interventional

Combined Estrogen Blockade of the Breast With Exemestane and Raloxifene in Postmenopausal Women With a History of Breast Cancer Who Have No Clinical Evidence of Disease

NCT00200174
View directory record Official record
Conditions
Breast Cancer
Interventions
Raloxifene followed by combination therapy, Exemestane followed by combination therapy
Drug
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older · Female only
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2008
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 5, 2023 · Synced Oct 10, 2026, 12:39 PM EDT
Completed Not applicable Interventional

Vitamin D, Cardiovascular Disease, and African Americans

NCT01655810
View directory record Official record
Conditions
Vitamin D Deficiency, Type 2 Diabetes Mellitus, Cardiovascular Disease
Interventions
Vitamin D3, Calcium carbonate
Dietary Supplement
Lead sponsor
Washington University School of Medicine
Other
Eligibility
50 Years to 70 Years
Enrollment
86 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2018
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 5, 2020 · Synced Oct 10, 2026, 12:39 PM EDT
Completed Not applicable Interventional Results available

Vitamin D Oral Replacement in Asthma

NCT03686150
View directory record Official record
Conditions
Asthma, Vitamin D Deficiency, Pediatric Obesity
Interventions
Vitamin D3 oral regimen
Dietary Supplement
Lead sponsor
IDeA States Pediatric Clinical Trials Network
Network
Eligibility
6 Years to 17 Years
Enrollment
112 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
15
States / cities
Little Rock, Arkansas • Wilmington, Delaware • Honolulu, Hawaii + 12 more
Source: ClinicalTrials.gov public record
Updated Apr 19, 2023 · Synced Oct 10, 2026, 12:39 PM 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 10, 2026, 12:39 PM EDT
Completed Phase 4 Interventional

A Randomized Phase IV Control Trial of Single High Dose Oral Vitamin D3 in Pediatric Patients Undergoing HSCT

NCT03176849
View directory record Official record
Conditions
Vitamin D Deficiency, Stem Cell Transplant Complications, Pediatric Cancer, Blood Disorder, Pediatric Acute Myeloid Leukemia, Pediatric Acute Lymphoid Leukemia, Myelodysplastic Syndromes, Sickle Cell Anemia in Children, Aplastic Anemia, Thalassemia in Children
Interventions
Vitamin D3, Standard Vitamin D3 Supplementation
Dietary Supplement
Lead sponsor
Phoenix Children's Hospital
Other
Eligibility
1 Year to 25 Years
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Nov 17, 2020 · Synced Oct 10, 2026, 12:39 PM EDT