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ClinicalTrials.gov public records Last synced Oct 24, 2026, 4:47 AM EDT

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Showing 481–504 of 530 matching trials from the live ClinicalTrials.gov search.
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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 24, 2026, 4:47 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 24, 2026, 4:47 AM EDT
Completed Phase 2 Interventional

Calcitriol in Treating Patients With a Rising PSA Level Following Treatment for Prostate Cancer

NCT00004043
View directory record Official record
Conditions
Prostate Cancer
Interventions
calcitriol
Dietary Supplement
Lead sponsor
OHSU Knight Cancer Institute
Other
Eligibility
18 Years to 120 Years · Male only
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2003
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Apr 28, 2017 · Synced Oct 24, 2026, 4:47 AM EDT
Completed Phase 2 Interventional Results available

Vitamin D in Treating Patients With Prostate Cancer

NCT00524680
View directory record Official record
Conditions
Prostate Cancer
Interventions
cholecalciferol
Dietary Supplement
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years to 120 Years · Male only
Enrollment
148 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2013
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Nov 2, 2015 · Synced Oct 24, 2026, 4:47 AM EDT
Completed Not applicable Interventional

Vitamin D to Improve Glucose Metabolism and Reduce Inflammation in Obese Adolescents

NCT00994396
View directory record Official record
Conditions
Obesity, Glucose Intolerance, Inflammation
Interventions
Placebo, Vitamin D 3 cholecalciferol
Dietary Supplement
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
9 Years to 19 Years
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 6, 2016 · Synced Oct 24, 2026, 4:47 AM 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 24, 2026, 4:47 AM EDT
Completed Early Phase 1 Interventional

Vitamin D Supplementation on 15-Prostaglandin Dehydrogenase Expression in Barrett's Esophagus

NCT01465113
View directory record Official record
Conditions
Short Segment Barrett's Esophagus, Long Segment Barrett's Esophagus
Interventions
Omeprazole, Vitamin D3, upper endoscopy, Metformin
Drug · Procedure
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2016
U.S. locations
3
States / cities
Beachwood, Ohio • Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 10, 2016 · Synced Oct 24, 2026, 4:47 AM EDT
Terminated Phase 3 Interventional

DN-101 in Combination With Docetaxel in Androgen-Independent Prostate Cancer (AIPC) (AIPC Study of Calcitriol Enhancing Taxotere [ASCENT-2])

NCT00273338
View directory record Official record
Conditions
Prostate Cancer
Interventions
calcitriol, docetaxel
Drug
Lead sponsor
Novacea
Industry
Eligibility
18 Years and older · Male only
Enrollment
1,200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
159
States / cities
Birmingham, Alabama • Muscle Shoals, Alabama • Anchorage, Alaska + 132 more
Source: ClinicalTrials.gov public record
Updated Nov 6, 2007 · Synced Oct 24, 2026, 4:47 AM EDT
Completed Phase 4 Interventional Results available

Repeated-dose Safety, Efficacy, Pharmacokinetic and Pharmacodynamic of CTAP101, Immediate-release Calcifediol, High-dose Cholecalciferol, and Paricalcitol Plus Low-dose Cholecalciferol in Patients With Secondary Hyperparathyroidism, Chronic Kidney Disease 3-4 and Vitamin D Insufficiency

NCT03588884
View directory record Official record
Conditions
Secondary Hyperparathyroidism Due to Renal Causes, Vitamin D Insufficiency, CKD Stage 3, CKD Stage 4
Interventions
Calcifediol Oral Capsule, Calcifediol Oral Product, Cholecalciferol, Paricalcitol Oral Capsule
Drug
Lead sponsor
OPKO Health, Inc.
Industry
Eligibility
18 Years and older
Enrollment
69 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
3
States / cities
Garden Grove, California • Chicago, Illinois • West Bend, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 9, 2022 · Synced Oct 24, 2026, 4:47 AM EDT
Terminated Early Phase 1 Interventional

Vitamin D and Cocaine Administration

NCT04826133
View directory record Official record
Conditions
Cocaine Use Disorder
Interventions
Calcitriol, Placebo
Drug · Other
Lead sponsor
Yale University
Other
Eligibility
30 Years to 55 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 14, 2023 · Synced Oct 24, 2026, 4:47 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 24, 2026, 4:47 AM EDT
Completed Phase 3 Interventional

Osteoporosis Prevention After Heart Transplant

NCT00000412
View directory record Official record
Conditions
Osteoporosis, Cardiac Transplantation
Interventions
Alendronate, Calcitriol, Placebo Alendronate, Placebo Calcitriol
Drug
Lead sponsor
Columbia University
Other
Eligibility
20 Years to 70 Years
Enrollment
149 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1997 – 2002
U.S. locations
2
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 7, 2015 · Synced Oct 24, 2026, 4:47 AM EDT
Withdrawn Not applicable Interventional

Vitamin D Supplementation in Chronic Rhinosinusitis With Nasal Polyps

NCT01185808
View directory record Official record
Conditions
Chronic Sinusitis
Interventions
Vitamin D
Biological
Lead sponsor
Medical University of South Carolina
Other
Eligibility
14 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated May 1, 2018 · Synced Oct 24, 2026, 4:47 AM EDT
Terminated Phase 2 Interventional Results available

Vitamin D to Prevent Severe Asthma Exacerbations (Vit-D-Kids Asthma)

NCT02687815
View directory record Official record
Conditions
Asthma
Interventions
vitamin D3 4000 IU, Placebo
Drug
Lead sponsor
Juan Celedon, MD
Other
Eligibility
6 Years to 16 Years
Enrollment
192 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
7
States / cities
San Francisco, California • Denver, Colorado • Boston, Massachusetts + 4 more
Source: ClinicalTrials.gov public record
Updated Aug 12, 2021 · Synced Oct 24, 2026, 4:47 AM EDT
Terminated Phase 2 Interventional

Arsenic Trioxide and Cholecalciferol (Vitamin D) in Treating Patients With Myelodysplastic Syndromes

NCT00104806
View directory record Official record
Conditions
Leukemia, Myelodysplastic Syndromes, Myelodysplastic/Myeloproliferative Neoplasms
Interventions
cholecalciferol, arsenic trioxide
Dietary Supplement · Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
Up to 120 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2010
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 10, 2018 · Synced Oct 24, 2026, 4:47 AM EDT
Withdrawn Phase 1 Interventional

PDT Plus Vitamin D3 for Anal Dysplasia

NCT02698293
View directory record Official record
Conditions
Anal Dysplasia, Carcinoma in Situ
Interventions
Gliolan, Vitamin D3 cholecalciferol), Photodynamic Therpay
Drug · Other
Lead sponsor
Abramson Cancer Center at Penn Medicine
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 4, 2026 · Synced Oct 24, 2026, 4:47 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Vitamin D for Painful Nocturnal Leg Cramps

NCT00715429
View directory record Official record
Conditions
Leg Cramps, Nocturnal
Interventions
vitamin d, placebo
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
50 Years and older
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2011
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Sep 17, 2019 · Synced Oct 24, 2026, 4:47 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D Needs of Early Adolescent Children

NCT00931580
View directory record Official record
Conditions
Healthy
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
University of Georgia
Other
Eligibility
9 Years to 13 Years
Enrollment
323 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
3
States / cities
Athens, Georgia • Indianapolis, Indiana • West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Sep 25, 2015 · Synced Oct 24, 2026, 4:47 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Efficacy of Daily Vitamin D3 Supplementation in Normal Weight Adolescents

NCT01058720
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Mayo Clinic
Other
Eligibility
12 Years to 18 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 1, 2016 · Synced Oct 24, 2026, 4:47 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 24, 2026, 4:47 AM EDT
Completed Phase 4 Interventional Results available

Paricalcitol Versus Calcitriol for Efficacy and Safety in Stage 3/4 Chronic Kidney Disease (CKD) With Secondary Hyperparathyroidism (SHPT)

NCT00823303
View directory record Official record
Conditions
Secondary Hyperparathyroidism, Chronic Kidney Disease
Interventions
Paricalcitol, Calcitriol
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
4
States / cities
Chicago, Illinois • Evanston, Illinois • Detroit, Michigan + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 7, 2014 · Synced Oct 24, 2026, 4:47 AM EDT
Completed No phase listed Observational

Study of Smith-Lemli-Opitz Syndrome

NCT00001721
View directory record Official record
Conditions
Smith-Lemli-Opitz Syndrome
Interventions
Cholesterol Suspension, CRH, Cholesterol
Drug
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
Not listed
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 1998
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 7, 2026 · Synced Oct 24, 2026, 4:47 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Pilot Pharmacokinetic Study of Daily Versus Monthly High-Dose Cholecalciferol Supplementation

NCT01079923
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Single High Dose Cholecalciferol, Daily Dose Cholecalciferol
Dietary Supplement
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Nov 20, 2012 · Synced Oct 24, 2026, 4:47 AM EDT
Completed Phase 2 Interventional Results available

Cathelicidin and Vitamin D: Impact on Populations At-Risk and With COPD

NCT02464059
View directory record Official record
Conditions
Pulmonary Disease, Chronic Obstructive
Interventions
Vitamin D3
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 80 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2020
U.S. locations
2
States / cities
Baltimore, Maryland • Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 24, 2020 · Synced Oct 24, 2026, 4:47 AM EDT