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ClinicalTrials.gov public records Last synced Oct 3, 2026, 12:14 PM EDT

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Showing 1–24 of 188 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Vitamin D - Treatment 2 Clear all
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Impact of Smoking Cessation and γ-Tocopherol to Restore Vascular Endothelial Function

NCT01314443
View directory record Official record
Conditions
Endothelial Dysfunction
Interventions
Nicotine Replacement Therapy (NRT), Gamma-Tocopherol, Placebo, Smoking cessation
Other · Dietary Supplement · Behavioral
Lead sponsor
University of Connecticut
Other
Eligibility
18 Years to 60 Years
Enrollment
67 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Storrs, Connecticut
Source: ClinicalTrials.gov public record
Updated Jan 21, 2015 · Synced Oct 3, 2026, 12:14 PM EDT
Active, not recruiting Phase 2 Interventional Results available

Treatment With Dinutuximab, Sargramostim (GM-CSF), and Isotretinoin in Combination With Irinotecan and Temozolomide After Intensive Therapy for People With High-Risk Neuroblastoma (NBL)

NCT04385277
View directory record Official record
Conditions
Ganglioneuroblastoma, Nodular, Neuroblastoma
Interventions
Biospecimen Collection, Bone Marrow Aspiration, Bone Marrow Biopsy, Computed Tomography, Dinutuximab, FDG-Positron Emission Tomography, Iobenguane I-123, Irinotecan, Isotretinoin, Magnetic Resonance Imaging, Multigated Acquisition Scan, Sargramostim, Temozolomide
Procedure · Biological · Radiation + 1 more
Lead sponsor
Children's Oncology Group
Network
Eligibility
Up to 30 Years
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
70
States / cities
Mesa, Arizona • Little Rock, Arkansas • Downey, California + 58 more
Source: ClinicalTrials.gov public record
Updated Oct 27, 2025 · Synced Oct 3, 2026, 12:14 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Vitamin D as a Therapeutic Adjunct in the Stimulant Treatment of ADHD

NCT03103750
View directory record Official record
Conditions
ADHD
Interventions
Magnetic Resonance Imaging (MRI), PHNO, calcitriol, Placebo oral capsule, high-resolution research tomography, Dextro Amphetamine
Procedure · Drug · Dietary Supplement
Lead sponsor
Yale University
Other
Eligibility
18 Years to 50 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2023
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 19, 2024 · Synced Oct 3, 2026, 12:14 PM EDT
Terminated Phase 2 Interventional Results available

Safety, Efficacy, PK and PD of CTAP101 (Calcifediol) ER Capsules for SHPT in HD Patients VDI

NCT03602261
View directory record Official record
Conditions
Secondary Hyperparathyroidism Due to Renal Causes, Chronic Kidney Diseases, Vitamin D Deficiency, Stage 5 Chronic Kidney Disease
Interventions
Calcifediol Oral Capsule, Placebo oral capsule
Drug
Lead sponsor
OPKO Health, Inc.
Industry
Eligibility
18 Years and older
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
18
States / cities
Peoria, Arizona • Phoenix, Arizona • Cypress, California + 13 more
Source: ClinicalTrials.gov public record
Updated Apr 3, 2026 · Synced Oct 3, 2026, 12:14 PM EDT
Completed Phase 2 Interventional Results available

Effects of an Antioxidant-Enriched Multivitamin Supplement on Inflammation and Oxidative Stress in Cystic Fibrosis

NCT01859390
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
AquADEKs-2, control multivitamin
Drug · Dietary Supplement
Lead sponsor
University of Colorado, Denver
Other
Eligibility
10 Years and older
Enrollment
73 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
15
States / cities
Tucson, Arizona • Aurora, Colorado • Orlando, Florida + 12 more
Source: ClinicalTrials.gov public record
Updated Jul 14, 2017 · Synced Oct 3, 2026, 12:14 PM EDT
Completed Phase 3 Interventional Results available

Study to Compare U0267 Against Vehicle in Subjects With Plaque-type Psoriasis Two of Two Phase 3 Studies

NCT00689481
View directory record Official record
Conditions
Psoriasis
Interventions
U0267 Foam, Vehicle foam
Drug
Lead sponsor
Stiefel, a GSK Company
Industry
Eligibility
12 Years and older
Enrollment
323 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008
U.S. locations
12
States / cities
Mobile, Alabama • Fremont, California • Ormond Beach, Florida + 9 more
Source: ClinicalTrials.gov public record
Updated Oct 7, 2016 · Synced Oct 3, 2026, 12:14 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Vitamin D Status of Pregnant Women and Their Children in Eau Claire, South Carolina

NCT00412087
View directory record Official record
Conditions
Vitamin D Deficiency, Pregnancy
Interventions
cholecalciferol (vitamin D3), cholecalciferol
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
16 Years to 45 Years · Female only
Enrollment
564 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Columbia, South Carolina
Source: ClinicalTrials.gov public record
Updated Jul 29, 2016 · Synced Oct 3, 2026, 12:14 PM EDT
Completed Phase 2 Interventional

Immune Effects of Vitamin D in Hemodialysis Patients

NCT00686751
View directory record Official record
Conditions
End Stage Renal Disease, Hemodialysis, Inflammatory Response, Cardiovascular Disease
Interventions
paricalcitol
Drug
Lead sponsor
Renal Research Institute
Other
Eligibility
18 Years to 75 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2007
U.S. locations
3
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 13, 2009 · Synced Oct 3, 2026, 12:14 PM EDT
Completed Phase 4 Interventional Results available

How Vitamin D Analogues Affect Endothelial Cells in Patients on Dialysis

NCT00528788
View directory record Official record
Conditions
Hyperparathyroidism, Secondary, Kidney Failure, Chronic
Interventions
doxercalciferol
Drug
Lead sponsor
Duke University
Other
Eligibility
18 Years to 80 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 22, 2016 · Synced Oct 3, 2026, 12:14 PM EDT
Completed Not applicable Interventional Results available

Cholecalciferol Versus Doxercalciferol in the Treatment of Secondary Hyperparathyroidism in Chronic Kidney Disease

NCT00285467
View directory record Official record
Conditions
Renal Osteodystrophy
Interventions
doxercalciferol, Cholecalciferol
Drug
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 82 Years
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated May 2, 2016 · Synced Oct 3, 2026, 12:14 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of VisionPure™ on Indices of Vision Health and Cognitive Function

NCT05533658
View directory record Official record
Conditions
Eye Health, Vision, Cognitive Function
Interventions
VisionPure Dietary Supplement, Placebo
Dietary Supplement
Lead sponsor
Applied Science & Performance Institute
Industry
Eligibility
18 Years to 40 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
3
States / cities
Lutz, Florida • Tampa, Florida
Source: ClinicalTrials.gov public record
Updated May 26, 2023 · Synced Oct 3, 2026, 12:14 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 3, 2026, 12:14 PM EDT
Completed Phase 3 Interventional Results available

Chemotherapy and Radiation Therapy in Treating Young Patients With Newly Diagnosed, Previously Untreated, High-Risk Medulloblastoma/PNET

NCT00392327
View directory record Official record
Conditions
Anaplastic Medulloblastoma, Medulloblastoma
Interventions
Biospecimen Collection, Carboplatin, Cisplatin, Cyclophosphamide, Filgrastim, Isotretinoin, Lumbar Puncture, Magnetic Resonance Imaging, Quality-of-Life Assessment, Radiation Therapy, Vincristine Sulfate
Procedure · Drug · Biological + 2 more
Lead sponsor
Children's Oncology Group
Network
Eligibility
3 Years to 22 Years
Enrollment
379 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2026
U.S. locations
170
States / cities
Birmingham, Alabama • Anchorage, Alaska • Mesa, Arizona + 126 more
Source: ClinicalTrials.gov public record
Updated Jun 8, 2026 · Synced Oct 3, 2026, 12:14 PM 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 3, 2026, 12:14 PM 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 3, 2026, 12:14 PM EDT
Completed Phase 2 Interventional Results available

Safety and Effectiveness of Alendronate for Bone Mineral Density in HIV-infected Children and Adolescents

NCT00921557
View directory record Official record
Conditions
HIV Infection
Interventions
Alendronate, Placebo, Calcium carbonate/vitamin D
Drug · Dietary Supplement
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
11 Years to 24 Years
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2017
U.S. locations
7
States / cities
Los Angeles, California • Miami, Florida • Tampa, Florida + 4 more
Source: ClinicalTrials.gov public record
Updated Nov 5, 2021 · Synced Oct 3, 2026, 12:14 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Bioequivalency Study of Calcitriol Tablets Under Fasting Conditions

NCT00601328
View directory record Official record
Conditions
Secondary Hyperparathyroidism, Hypocalcemia
Interventions
Calcitriol
Drug
Lead sponsor
Roxane Laboratories
Industry
Eligibility
18 Years to 45 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003
U.S. locations
1
States / cities
Springfield, Missouri
Source: ClinicalTrials.gov public record
Updated Jan 23, 2018 · Synced Oct 3, 2026, 12:14 PM EDT
Recruiting Not applicable Interventional

Vitamin D Effects on Immune Microenvironment of Nonmelanoma Skin Cancer After Photodynamic Therapy (PDT)

NCT07241585
View directory record Official record
Conditions
Nonmelanoma Skin Cancer, Basal Cell Carcinoma, Squamous Cell Carcinoma
Interventions
Vitamin D (VitD), Placebo, Photodynamic therapy (PDT), Mohs surgery or electrodessication & curettage (ED&C) (standard of care)
Dietary Supplement · Other · Procedure
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 18, 2026 · Synced Oct 3, 2026, 12:14 PM EDT
Completed Phase 4 Interventional

Pilot Study Evaluating Doxercalciferol Replacement Therapy in Kidney Transplant Recipients

NCT00889629
View directory record Official record
Conditions
Chronic Kidney Disease, Kidney Transplantation
Interventions
Doxercalciferol, placebo, 25-OH Vitamin D3
Drug
Lead sponsor
Mariana Markell
Other
Eligibility
18 Years to 65 Years
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
Brooklyn, New York
Source: ClinicalTrials.gov public record
Updated Feb 22, 2019 · Synced Oct 3, 2026, 12:14 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Vitamin K to Slow Progression of Dyslipidemia and Diabetes Risk (Vita-K 'n' Kids Study II)

NCT02959762
View directory record Official record
Conditions
Obesity, Insulin Resistance, Obesity in Diabetes, Nutritional and Metabolic Diseases, Hyperlipidemia, Hyperglycemia, Cardiovascular Diseases
Interventions
Placebo-Control, Low-Dose Vitamin K2 (menaquinone-7; 45-mcg/d), High-Dose Vitamin K2 (menaquinone-7; 90 mcg/d)
Dietary Supplement
Lead sponsor
Augusta University
Other
Eligibility
8 Years to 17 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Nov 20, 2019 · Synced Oct 3, 2026, 12:14 PM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers

Efficacy Of Ergocalciferol In Adults According To BMI

NCT02435771
View directory record Official record
Conditions
Obesity, Vitamin D Deficiency
Interventions
Ergocalciferols
Drug
Lead sponsor
Walter Reed National Military Medical Center
Federal
Eligibility
18 Years to 65 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2017
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated May 11, 2017 · Synced Oct 3, 2026, 12:14 PM 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 3, 2026, 12:14 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Vitamin D to ENhance TraUma REcovery

NCT05458024
View directory record Official record
Conditions
Musculoskeletal Pain
Interventions
Vitamin D 2, Vitamin D2 Placebo
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 65 Years
Enrollment
71 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
4
States / cities
Worcester, Massachusetts • St Louis, Missouri • Camden, New Jersey + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 28, 2025 · Synced Oct 3, 2026, 12:14 PM EDT
Completed Phase 1 Interventional

Vitamin D as a Nutritional Neoadjuvant During Photodynamic Therapy of Basal Cell Carcinoma

NCT03467789
View directory record Official record
Conditions
Basal Cell Carcinoma, Basal Cell Nevus Syndrome
Interventions
Dietary Vitamin D3 pre-treatment, Photodynamic therapy, Serum Maintenance Vitamin D3
Drug · Radiation
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
Not listed
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
2
States / cities
Phoenix, Arizona • Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 17, 2024 · Synced Oct 3, 2026, 12:14 PM EDT