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ClinicalTrials.gov public records Last synced Oct 14, 2026, 3:49 PM EDT

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Showing 313–336 of 959 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Vitamin D (cholecalciferol) Clear all
Completed Not applicable Interventional Accepts healthy volunteers Results available

Vitamin D Supplementation and Muscle Function in Older Adults

NCT02015611
View directory record Official record
Conditions
Neuromuscular Function
Interventions
Vitamin D, Placebo
Dietary Supplement
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
65 Years to 89 Years
Enrollment
136 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 15, 2022 · Synced Oct 14, 2026, 3:49 PM EDT
Terminated Not applicable Interventional Results available

Vitamin D for Women at Increased Risk of Developing Ovarian, Fallopian, or Primary Peritoneal Cancer

NCT01744821
View directory record Official record
Conditions
Ovarian Cancer, Fallopian Tube Cancer, Primary Peritoneal Cancer
Interventions
Arm A: Vitamin D3 Group, Placebo
Dietary Supplement
Lead sponsor
Northwestern University
Other
Eligibility
18 Years and older · Female only
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
2
States / cities
Chicago, Illinois • Evanston, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 23, 2015 · Synced Oct 14, 2026, 3:49 PM EDT
Not listed Phase 2 Interventional

Efficacy Study of Inecalcitol With Decitabine in Acute Myeloid Leukemia Patients Unfit for Standard Chemotherapy

NCT02802267
View directory record Official record
Conditions
Acute Myelogenous Leukemia
Interventions
Inecalcitol, Placebo Oral Tablet
Drug
Lead sponsor
Hybrigenics Corporation
Industry
Eligibility
65 Years and older
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
7
States / cities
San Diego, California • Augusta, Georgia • Las Vegas, Nevada + 4 more
Source: ClinicalTrials.gov public record
Updated Jul 2, 2017 · Synced Oct 14, 2026, 3:49 PM EDT
Completed Not applicable Interventional

Bioavailability and Biological Effects of Vitamin D2 Contained in Mushroom

NCT01488734
View directory record Official record
Conditions
Vitamin D Deficiency, Metabolic Syndrome, Prediabetes
Interventions
Mushroom with 600 IU vitamin D2, Mushroom with 4000 IU Vitamin D2, 600 IU Vitamin D3 and untreated mushroom, 4000 IU Vitamin D3 and untreated mushroom, Placebo
Dietary Supplement · Drug
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
30 Years to 90 Years
Enrollment
47 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 14, 2017 · Synced Oct 14, 2026, 3:49 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Correlation Between Relapses in Multiple Sclerosis (MS) and Vitamin D Intake

NCT01994018
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Not listed
Lead sponsor
OSF Healthcare System
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Peoria, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 29, 2022 · Synced Oct 14, 2026, 3:49 PM EDT
Suspended Phase 1Phase 2 Interventional

Vitamin D and Bone Homeostasis in Ortho Polytrauma Patients

NCT03066817
View directory record Official record
Conditions
Vitamin D Deficiency, Polytrauma, Orthopedic Disorder
Interventions
Ergocalciferol 8000 IU/ML Oral Liquid [DRISDOL], Propylene Glycol
Drug
Lead sponsor
New York City Health and Hospitals Corporation
Other
Eligibility
18 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Apr 4, 2019 · Synced Oct 14, 2026, 3:49 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Age Related Changes in Calciotropic Hormones and Their Impact on Male Osteoporosis

NCT00588874
View directory record Official record
Conditions
Low Bone Density
Interventions
Not listed
Lead sponsor
Yale University
Other
Eligibility
50 Years and older · Male only
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2000 – 2008
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 30, 2023 · Synced Oct 14, 2026, 3:49 PM 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 14, 2026, 3:49 PM 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, 3:49 PM EDT
Completed Phase 1 Interventional

Effects of Treating Vitamin D Deficiency in Poorly Controlled Type 2 Diabetes

NCT01855321
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Vitamin D, Placebo
Drug
Lead sponsor
University of Florida
Other
Eligibility
30 Years to 65 Years
Enrollment
76 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jun 26, 2015 · Synced Oct 14, 2026, 3:49 PM EDT
Completed Phase 3 Interventional Results available

Prevention of Osteoporosis in Bone Marrow Transplantation (BMT) Patients

NCT00824993
View directory record Official record
Conditions
Hematological Malignancies
Interventions
Ibandronate, Vitamin Supplements
Drug
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
78 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2017
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Sep 13, 2018 · Synced Oct 14, 2026, 3:49 PM EDT
Completed No phase listed Observational

Vitamin D3 Supplementation in Pediatric IBD: Weely vs Daily Dosing Regimens

NCT02256605
View directory record Official record
Conditions
Inflammatory Bowel Disease (IBD)
Interventions
Vitamin D-3
Dietary Supplement
Lead sponsor
Nemours Children's Clinic
Other
Eligibility
5 Years to 17 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated May 29, 2015 · Synced Oct 14, 2026, 3:49 PM 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, 3:49 PM EDT
Terminated Phase 4 Interventional

Evaluate the Survival Benefits of Zemplar Versus Calcijex in Subjects w/ Stage V Chronic Kidney Disease on Hemodialysis

NCT00062699
View directory record Official record
Conditions
End-Stage Kidney Disease
Interventions
Zemplar (paricalcitol injection), Calcijex
Drug
Lead sponsor
Abbott
Industry
Eligibility
20 Years and older
Enrollment
2,200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2003
U.S. locations
60
States / cities
Tuscaloosa, Alabama • Inglewood, California • Los Angeles, California + 40 more
Source: ClinicalTrials.gov public record
Updated Aug 2, 2006 · Synced Oct 14, 2026, 3:49 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Ergogenic Effects of Sportlegs

NCT06371521
View directory record Official record
Conditions
Performance Enhancing Product Use
Interventions
Sportlegs, Placebo
Dietary Supplement
Lead sponsor
Christopher Bell
Other
Eligibility
18 Years to 30 Years
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 12, 2024 · Synced Oct 14, 2026, 3:49 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 14, 2026, 3:49 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Optimization of Blood Levels of 25(OH)-Vitamin D in African Americans

NCT04939792
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D, Placebo, Vitamin D + L-cysteine, L-cysteine
Drug
Lead sponsor
Louisiana State University Health Sciences Center Shreveport
Other
Eligibility
18 Years to 65 Years
Enrollment
165 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Shreveport, Louisiana
Source: ClinicalTrials.gov public record
Updated Jun 8, 2023 · Synced Oct 14, 2026, 3:49 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Safety of Vitamin D Supplementation in Older Persons

NCT00681590
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
cholecalciferol (vitamin D)
Dietary Supplement
Lead sponsor
University of Miami
Other
Eligibility
65 Years to 95 Years
Enrollment
105 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jan 26, 2017 · Synced Oct 14, 2026, 3:49 PM 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, 3:49 PM EDT
Withdrawn Not applicable Interventional

Vitamin D in Active Tuberculosis (TB) Study

NCT00788320
View directory record Official record
Conditions
Tuberculosis
Interventions
Vitamin D3, Placebo
Drug
Lead sponsor
Atlanta VA Medical Center
Federal
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 20, 2012 · Synced Oct 14, 2026, 3:49 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Vitamin D Dose and Genotype of the Binding Protein in Infants and Children

NCT01050387
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D
Dietary Supplement
Lead sponsor
Yale University
Other
Eligibility
6 Months to 6 Years
Enrollment
193 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 5, 2014 · Synced Oct 14, 2026, 3:49 PM EDT
Completed Phase 2 Interventional Results available

A Study in Adult Patients With Type I, III or IV Osteogenesis Imperfecta Treated With BPS804

NCT03118570
View directory record Official record
Conditions
Osteogenesis Imperfecta, Type I, Osteogenesis Imperfecta Type III, Osteogenesis Imperfecta Type IV
Interventions
setrusumab, Calcium, Vitamin D, zoledronic acid (optional)
Drug · Dietary Supplement
Lead sponsor
Ultragenyx Pharmaceutical Inc
Industry
Eligibility
18 Years to 75 Years
Enrollment
112 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
12
States / cities
Birmingham, Alabama • Jacksonville, Florida • Baltimore, Maryland + 9 more
Source: ClinicalTrials.gov public record
Updated Jul 5, 2023 · Synced Oct 14, 2026, 3:49 PM EDT
Completed Not applicable Interventional Results available

Individualized Response to Vitamin D Treatment Study

NCT02925195
View directory record Official record
Conditions
Characteristics That Modify the Response to Cholecalciferol Treatment
Interventions
Vitamin D3, Placebo
Dietary Supplement · Drug
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
666 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
5
States / cities
Los Angeles, California • Evanston, Illinois • Baltimore, Maryland + 2 more
Source: ClinicalTrials.gov public record
Updated Nov 2, 2023 · Synced Oct 14, 2026, 3:49 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Vitamin D and Fish Oil for Autoimmune Disease, Inflammation and Knee Pain

NCT01351805
View directory record Official record
Conditions
Autoimmune Diseases, Systemic Inflammatory Process, Knee Pain Chronic, Osteoarthritis, Rheumatoid Arthritis
Interventions
Fish Oil, Vitamin D, placebo pill
Drug · Dietary Supplement · Other
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
25,871 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 3, 2025 · Synced Oct 14, 2026, 3:49 PM EDT