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ClinicalTrials.gov public records Last synced Oct 15, 2026, 10:35 AM EDT

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Showing 433–456 of 960 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: cholecalciferol (vitamin D) Clear all
Completed Phase 4 Interventional Results available

PK and PD Study of Calcitriol 3 mcg/g Ointment in Pediatric Subjects With Plaque Psoriasis

NCT01766440
View directory record Official record
Conditions
Plaque Psoriasis
Interventions
Calcitriol 3 mcg/g ointment
Drug
Lead sponsor
Galderma R&D
Industry
Eligibility
2 Years to 12 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
8
States / cities
San Diego, California • Indianapolis, Indiana • Ann Arbor, Michigan + 5 more
Source: ClinicalTrials.gov public record
Updated Feb 18, 2021 · Synced Oct 15, 2026, 10:35 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 15, 2026, 10:35 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Suspected Deficient Activation of Vitamin D in Patients With Secondary Hyperparathyroidism

NCT00754442
View directory record Official record
Conditions
Secondary Hyperparathyroidism
Interventions
Teriparatide
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
40 Years to 59 Years · Female only
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 1, 2022 · Synced Oct 15, 2026, 10:35 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Vitamin D Intervention and Associated Changes in the Gut Microbiome and Vitamin D Levels in Healthy Adults

NCT05387876
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Vitamin D intervention, Placebo intervention
Dietary Supplement
Lead sponsor
Baylor University
Other
Eligibility
18 Years to 79 Years
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Waco, Texas
Source: ClinicalTrials.gov public record
Updated May 24, 2022 · Synced Oct 15, 2026, 10:35 AM 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 15, 2026, 10:35 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Is Treatment of Vitamin D Deficiency Associated With Resolution of Statin-Induced Muscular Symptoms

NCT01568255
View directory record Official record
Conditions
Myopathic Symptoms
Interventions
Ergocalciferol, Placebo
Drug
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years and older · Female only
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2019
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jun 10, 2021 · Synced Oct 15, 2026, 10:35 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Combinatorial Nutritional Supplementation on Immune Function in Healthy Older Adults

NCT02876315
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Redoxon VI, placebo
Dietary Supplement
Lead sponsor
Oregon State University
Other
Eligibility
55 Years to 75 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Corvallis, Oregon
Source: ClinicalTrials.gov public record
Updated Dec 1, 2022 · Synced Oct 15, 2026, 10:35 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Interventional Testing of Gene-environment Interactions Via the Verifomics Mobile Application

NCT02758990
View directory record Official record
Conditions
Obesity, Rhinitis, Rhinitis, Allergic, Respiratory Sounds, Dyspnea, Headache, Migraine Disorders, Arthritis, Arthralgia, Anxiety, Sleep Initiation and Maintenance Disorders, Sleep Deprivation
Interventions
Vitamin A, Vitamin B6, Vitamin C, Nicotinamide, Vitamin D3, Vitamin E, Broccoli, Spinach, Caffeine, Coffee, Axon Eyewear, Chocolate
Dietary Supplement · Other · Device
Lead sponsor
Verifomics LLC
Industry
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Oct 2, 2017 · Synced Oct 15, 2026, 10:35 AM EDT
Completed Phase 4 Interventional Results available

Evaluating Vitamin D3 Supplement on Post-Op Outcomes

NCT04177758
View directory record Official record
Conditions
Knee Osteoarthritis
Interventions
Vitamin D, Control
Drug
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years to 80 Years
Enrollment
137 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 12, 2023 · Synced Oct 15, 2026, 10:35 AM EDT
Completed Phase 2 Interventional Results available

Vitamin D Supplementation in Veterans With Early-Stage Prostate Cancer

NCT00953225
View directory record Official record
Conditions
Prostate Cancer
Interventions
vitamin D3, Placebo daily for one year
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
19 Years to 85 Years · Male only
Enrollment
83 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
2
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Oct 9, 2017 · Synced Oct 15, 2026, 10:35 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 15, 2026, 10:35 AM EDT
Completed Early Phase 1 Interventional

High Dose Vit D Musculoskeletal Symptoms & Bone Density in Anastrozole-Treated Breast Cancer With Marginal Vit D Status

NCT00263185
View directory record Official record
Conditions
Breast Neoplasms
Interventions
Vitamin D, Calcium carbonate, Vitamin D, Placebo
Dietary Supplement · Drug · Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older · Female only
Enrollment
63 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2009
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Sep 22, 2014 · Synced Oct 15, 2026, 10:35 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

The Effectiveness of a Weight-dependent Algorithm for Dosing Vitamin D.

NCT07876843
View directory record Official record
Conditions
Hypovitaminosis D
Interventions
Vitamin D3, Calcium, and Vitamin C
Dietary Supplement
Lead sponsor
Atlantic Health System
Other
Eligibility
6 Years to 21 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2027 – 2032
U.S. locations
1
States / cities
Morristown, New Jersey
Source: ClinicalTrials.gov public record
Updated Oct 15, 2026 · Synced Oct 15, 2026, 10:35 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 15, 2026, 10:35 AM EDT
Completed Phase 2Phase 3 Interventional Results available

PTH & Ibandronate Combination Study (PICS)

NCT00683163
View directory record Official record
Conditions
Osteoporosis
Interventions
PTH(1-84), Ibandronate, Placebo injection, Placebo pills
Drug · Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
55 Years to 75 Years · Female only
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Nov 5, 2013 · Synced Oct 15, 2026, 10:35 AM EDT
Completed Phase 2 Interventional Results available

Bone Mass and Strength After Kidney Transplantation

NCT02224144
View directory record Official record
Conditions
End Stage Renal Disease, Kidney Transplantation, Bone Loss, Fractures, Vascular Calcifications
Interventions
Vitamin D3, Calcitriol, Placebo
Drug
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 7, 2025 · Synced Oct 15, 2026, 10:35 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Curves 30/30 Study

NCT04344821
View directory record Official record
Conditions
Weight Loss
Interventions
Curves Calcium, Placebo
Dietary Supplement
Lead sponsor
Texas A&M University
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Apr 15, 2020 · Synced Oct 15, 2026, 10:35 AM EDT
Completed Phase 2 Interventional Results available

Statin/Vitamin D & Migraine Study

NCT01225263
View directory record Official record
Conditions
Migraine
Interventions
Simvastatin, Vitamin D, Placebo
Drug · Dietary Supplement · Other
Lead sponsor
Rami Burstein
Other
Eligibility
18 Years and older
Enrollment
89 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 26, 2016 · Synced Oct 15, 2026, 10:35 AM EDT
Active, not recruiting Phase 4 Interventional

Novel Precision Medicine Approach to Treatment of Osteoporosis Based on Bone Turnover

NCT05151484
View directory record Official record
Conditions
Age-Related Osteoporosis
Interventions
Teriparatide, Alendronate
Drug
Lead sponsor
Madhumathi Rao
Other
Eligibility
40 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated May 14, 2026 · Synced Oct 15, 2026, 10:35 AM EDT
Completed Not applicable Interventional Results available

Pilot Trial to Evaluate the Effect of Vitamin D on Melanocyte Biomarkers

NCT01477463
View directory record Official record
Conditions
Melanoma, Skin
Interventions
Vitamin D3, placebo and vitamin D
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 75 Years · Female only
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Dec 23, 2016 · Synced Oct 15, 2026, 10:35 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

A Study of Hydroxychloroquine, Vitamin C, Vitamin D, and Zinc for the Prevention of COVID-19 Infection

NCT04335084
View directory record Official record
Conditions
COVID-19, Coronavirus Infection, Sars-CoV2, Corona Virus Infection, COVID, Coronavirus, Coronavirus-19, Coronavirus 19
Interventions
Hydroxychloroquine, Vitamin C, Vitamin D, Zinc
Drug · Dietary Supplement
Lead sponsor
ProgenaBiome
Other
Eligibility
18 Years and older
Enrollment
254 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2024
U.S. locations
1
States / cities
Ventura, California
Source: ClinicalTrials.gov public record
Updated Jun 5, 2025 · Synced Oct 15, 2026, 10:35 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Treatment of Vitamin D Insufficiency

NCT00933244
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
High Dose Vitamin D3, Low Dose Vitamin D3, Placebo
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
Up to 75 Years · Female only
Enrollment
230 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Nov 10, 2015 · Synced Oct 15, 2026, 10:35 AM EDT
Completed Phase 2 Interventional Results available

Sunshine 2 Study for Women With Diabetes

NCT01904032
View directory record Official record
Conditions
Diabetes, Depression, Quality of Life
Interventions
Vitamin D3, Vitamin D3 comparator
Drug
Lead sponsor
Loyola University
Other
Eligibility
21 Years and older · Female only
Enrollment
265 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
1
States / cities
Maywood, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 26, 2022 · Synced Oct 15, 2026, 10:35 AM EDT
Completed Not applicable Interventional Results available

Evaluation of Vitamin D in Women With PCOS and Sexual Dysfunction

NCT02865187
View directory record Official record
Conditions
Female Sexual Dysfunction, Polycystic Ovary Syndrome
Interventions
Vitamin D, Hormonal contraception
Dietary Supplement · Drug
Lead sponsor
Wright State University
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
47 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
2
States / cities
Dayton, Ohio • Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 25, 2022 · Synced Oct 15, 2026, 10:35 AM EDT