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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Disorder of Vitamin D Clear all
Completed Not applicable Interventional

Role of Vitamin D in Secondary Prevention of Cardiovascular Events

NCT01018849
View directory record Official record
Conditions
Cardiovascular Disease
Interventions
Cholecalciferol, Placebo
Dietary Supplement
Lead sponsor
Creighton University
Other
Eligibility
19 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2015
U.S. locations
2
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Jan 14, 2016 · Synced Jul 22, 2026, 11:15 PM EDT
Completed Phase 3 Interventional

Rhinitis in the Elderly: The Role of Vitamin D

NCT02272101
View directory record Official record
Conditions
Rhinitis
Interventions
Vitamin D versus placebo
Dietary Supplement
Lead sponsor
Rohr and Columbo Asthma, Allergy and Immunology Specialists, P.C.
Other
Eligibility
65 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
2
States / cities
Bryn Mawr, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 21, 2014 · Synced Jul 22, 2026, 11:15 PM EDT
Completed Not applicable Interventional

The Effect of Vitamin D Repletion on Small Low Density Lipoprotein (LDL) Particle Number in Subjects at Elevated Cardiovascular Risk

NCT01008384
View directory record Official record
Conditions
Atherosclerosis
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Rockefeller University
Other
Eligibility
18 Years to 85 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 31, 2012 · Synced Jul 22, 2026, 11:15 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 4, 2020 · Synced Jul 22, 2026, 11:15 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 28, 2022 · Synced Jul 22, 2026, 11:15 PM EDT
Completed Phase 1Phase 2 Interventional Results available

A Repeated Study of KRN23 in Adults With X-Linked Hypophosphatemia

NCT01340482
View directory record Official record
Conditions
X-linked Hypophosphatemia
Interventions
KRN23
Drug
Lead sponsor
Kyowa Kirin Co., Ltd.
Industry
Eligibility
18 Years and older
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
5
States / cities
San Francisco, California • New Haven, Connecticut • Indianapolis, Indiana + 2 more
Source: ClinicalTrials.gov public record
Updated Jun 17, 2024 · Synced Jul 22, 2026, 11:15 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Analysis of Response of Subjects With Atopic Dermatitis or Psoriasis to Oral Vitamin D3

NCT00789880
View directory record Official record
Conditions
Atopic Dermatitis, Psoriasis
Interventions
Vitamin D3, Placebo
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 70 Years
Enrollment
82 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
3
States / cities
San Diego, California • Denver, Colorado • Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Apr 11, 2017 · Synced Jul 22, 2026, 11:15 PM EDT
Completed Phase 3 Interventional Results available

Double-blind Extension of HORIZON Pivotal Fracture Trial (Zoledronic Acid in the Treatment of Postmenopausal Osteoporosis)

NCT00145327
View directory record Official record
Conditions
Osteoporosis
Interventions
Zoledronic Acid, Placebo
Drug
Lead sponsor
Novartis
Industry
Eligibility
68 Years to 90 Years · Female only
Enrollment
2,456 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2009
U.S. locations
30
States / cities
Tucson, Arizona • Little Rock, Arkansas • Beverly Hills, California + 26 more
Source: ClinicalTrials.gov public record
Updated Jun 27, 2011 · Synced Jul 22, 2026, 11:15 PM EDT
Completed Phase 2 Interventional

Phase II Pre-operative Vitamin D Supplementation to Prevent Post-thyroidectomy Hypocalcemia

NCT01868750
View directory record Official record
Conditions
Thyroid Nodules, Hypocalcemia
Interventions
Calcitriol, Control Pill
Dietary Supplement
Lead sponsor
David Shonka, MD
Other
Eligibility
18 Years and older
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2021
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Oct 11, 2021 · Synced Jul 22, 2026, 11:15 PM EDT
Not listed Not applicable Interventional

Immunonutrition in Ulcerative Colitis

NCT03594708
View directory record Official record
Conditions
Ulcerative Colitis
Interventions
Nutrition supplement, Placebo supplement
Dietary Supplement
Lead sponsor
Baptist Memorial Health Care Corporation
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 19, 2018 · Synced Jul 22, 2026, 11:15 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 3, 2019 · Synced Jul 22, 2026, 11:15 PM EDT
Terminated Phase 4 Interventional Results available

Trial of High Dose Vitamin D in Patient's With Crohn's Disease

NCT02208310
View directory record Official record
Conditions
Crohn's Disease, Vitamin D Deficiency
Interventions
Cholecalciferol 10,000 IU, Cholecalciferol 400 IU
Drug
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 75 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
4
States / cities
Indianapolis, Indiana • Iowa City, Iowa • Ann Arbor, Michigan + 1 more
Source: ClinicalTrials.gov public record
Updated Oct 5, 2017 · Synced Jul 22, 2026, 11:15 PM EDT
Completed Phase 2 Interventional Results available

Vitamin D3 Effects on Musculoskeletal Symptoms With Use of Aromatase Inhibitors

NCT01509079
View directory record Official record
Conditions
Muscle Pain, Joint Pain
Interventions
Vitamin D3
Drug
Lead sponsor
HealthPartners Institute
Other
Eligibility
18 Years and older · Female only
Enrollment
116 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 17, 2019 · Synced Jul 22, 2026, 11:15 PM EDT
Active, not recruiting No phase listed Observational

Vitamin D and Immune Mechanisms of Hypertension in Type 2 Diabetics

NCT03348280
View directory record Official record
Conditions
Diabetes Mellitus, Type 2, Hypertension, Vitamin D Deficiency
Interventions
Blood draw
Diagnostic Test
Lead sponsor
Washington University School of Medicine
Other
Eligibility
25 Years to 80 Years
Enrollment
40 participants
Timeline
2017 – 2026
U.S. locations
2
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 23, 2025 · Synced Jul 22, 2026, 11:15 PM EDT
Completed Phase 1 Interventional

Vitamin D Pilot Study in Patients With Multiple Sclerosis

NCT01257958
View directory record Official record
Conditions
Relapsing Remitting Multiple Sclerosis
Interventions
19 nor vitamin d
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 45 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2000
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 4, 2015 · Synced Jul 22, 2026, 11:15 PM EDT
Completed Phase 2 Interventional

Vitamin D3 Supplementation for Heart Failure Patients

NCT01636570
View directory record Official record
Conditions
Heart Failure, Vitamin D Deficiency, Cardiomyopathy, Congestive Heart Failure
Interventions
Placebo Comparator: Sugar Pill, Vitamin D3 (cholecalciferol)
Drug
Lead sponsor
Heidi Moretti, MS, RD
Other
Eligibility
Not listed
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
2
States / cities
Missoula, Montana
Source: ClinicalTrials.gov public record
Updated Apr 25, 2017 · Synced Jul 22, 2026, 11:15 PM EDT
Completed Phase 1 Interventional

Vitamin D Regulation of Gut Specific B Cells and Antibodies Targeting Gut Bacteria in Inflammatory Bowel Disease

NCT04828031
View directory record Official record
Conditions
Inflammatory Bowel Diseases, Ulcerative Colitis, Crohn Disease
Interventions
Vitamin D
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Sep 20, 2023 · Synced Jul 22, 2026, 11:15 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

25-Hydroxyvitamin D Pharmacokinetic Study

NCT03401541
View directory record Official record
Conditions
Vitamin D Deficiency, Fat Malabsorption
Interventions
Calcifediol, Calciferol
Drug
Lead sponsor
Boston University
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 3, 2020 · Synced Jul 22, 2026, 11:15 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Vitamin D for Chemoprevention

NCT00585637
View directory record Official record
Conditions
Gastrointestinal Cancers, Prostate Cancer, Hypertension
Interventions
Vitamin D, Placebo
Drug · Dietary Supplement
Lead sponsor
Dana-Farber Cancer Institute
Other
Eligibility
30 Years to 80 Years
Enrollment
328 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2013
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 31, 2015 · Synced Jul 22, 2026, 11:15 PM EDT
Completed Phase 2 Interventional Results available

Treatment of Hypoparathyroidism With Synthetic Human Parathyroid Hormone 1-34

NCT00001304
View directory record Official record
Conditions
Hypoparathyroidism
Interventions
Synthetic Human Parathyroid Hormone 1-34, Calcitriol & Calcium
Drug
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
17 Years to 69 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1991 – 2014
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 14, 2015 · Synced Jul 22, 2026, 11:15 PM EDT
Withdrawn Phase 3 Interventional

Therapeutic Benefit of Preoperative Supplemental Vitamin D in Patients Undergoing Major Surgical Procedures.

NCT02138591
View directory record Official record
Conditions
Vitamin d Deficiency
Interventions
Blood draw pre-operatively, Blood draw post-operative Day 1, Blood draw post-operative Day 2
Procedure
Lead sponsor
University of Missouri, Kansas City
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016
U.S. locations
1
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 15, 2017 · Synced Jul 22, 2026, 11:15 PM 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 21, 2014 · Synced Jul 22, 2026, 11:15 PM EDT
Terminated Phase 2 Interventional Results available

Study to Assess Prevention of Oxaliplatin-induced Neurotoxicity Through Vitamin D Pathway

NCT01499940
View directory record Official record
Conditions
Neurotoxicity
Interventions
Vitamin D3
Drug
Lead sponsor
Gerald Higa, PharmD.
Other
Eligibility
18 Years to 90 Years
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012
U.S. locations
1
States / cities
Morgantown, West Virginia
Source: ClinicalTrials.gov public record
Updated Nov 9, 2021 · Synced Jul 22, 2026, 11:15 PM EDT
Completed Not applicable Interventional Results available

Vitamin D Repletion in Coronary Artery Disease

NCT01570309
View directory record Official record
Conditions
Vitamin D Deficiency, Coronary Artery Disease, Endothelial Dysfunction, Inflammation
Interventions
Ergocalciferol, Sugar pill
Drug · Other
Lead sponsor
Seth I. Sokol, M.D.
Other
Eligibility
18 Years and older
Enrollment
96 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
2
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Oct 9, 2013 · Synced Jul 22, 2026, 11:15 PM EDT