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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Vitamin D3 Clear all
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Blood Pressure in Blacks and Calcium (BBC) and Vitamin D Study

NCT03070483
View directory record Official record
Conditions
Hypertension, Vitamin D Deficiency
Interventions
Cholecalciferol
Drug
Lead sponsor
Loyola University
Other
Eligibility
25 Years to 45 Years
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Maywood, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 23, 2020 · Synced Sep 26, 2026, 8:32 PM EDT
Completed Phase 2 Interventional Results available

Intralesional Vitamin D Injection for Treatment of Common Warts

NCT04278573
View directory record Official record
Conditions
Warts
Interventions
Vitamin D3, Placebo
Drug
Lead sponsor
Stephen P. Merry
Other
Eligibility
18 Years and older
Enrollment
77 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 29, 2024 · Synced Sep 26, 2026, 8:32 PM EDT
Completed Not applicable Interventional

Correlative Analysis of the Genomics of Vitamin D and Omega-3 Fatty Acid Intake in Prostate Cancer

NCT03290417
View directory record Official record
Conditions
Prostate Cancer
Interventions
Vitamin D, Omega-3, Turmeric
Dietary Supplement
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
Male only
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 17, 2020 · Synced Sep 26, 2026, 8:32 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Consumption of Post-harvest UV-B Treated Mushrooms on Vitamin D Status of Healthy Adults

NCT01443897
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
1,000 IU vitamin D2, placebo capsule, mushrooms, UVB-treated mushrooms, 400 IU vitamin D2, UVB-treated mushrooms, 1,000 IU vitamin D2
Dietary Supplement · Other
Lead sponsor
USDA, Western Human Nutrition Research Center
Federal
Eligibility
20 Years to 59 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Sep 29, 2011 · Synced Sep 26, 2026, 8:32 PM EDT
Completed Phase 2 Interventional Results available

High Dose Vitamin D for Sickle Cell Disease

NCT01331148
View directory record Official record
Conditions
Sickle Cell Disease
Interventions
Vitamin D, Placebo
Drug · Other
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
7 Years to 21 Years
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Aug 8, 2022 · Synced Sep 26, 2026, 8:32 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 Sep 26, 2026, 8:32 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 Sep 26, 2026, 8:32 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Impact of Vitamin D Supplements on Mental Health and Milk Composition in Mothers Living in Idaho

NCT06919718
View directory record Official record
Conditions
Maternal Stress
Interventions
Vitamin D (Cholecalciferol ), Placebo
Dietary Supplement · Other
Lead sponsor
University of Idaho
Other
Eligibility
18 Years to 64 Years · Female only
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
2
States / cities
Coeur d'Alene, Idaho • Moscow, Idaho
Source: ClinicalTrials.gov public record
Updated Sep 14, 2026 · Synced Sep 26, 2026, 8:32 PM EDT
Completed Phase 4 Interventional

Study of Safety and Efficacy of Doxercalciferol in Patients With Chronic Kidney Disease, Stage 3 or 4, and Secondary Hyperparathyroidism

NCT00123461
View directory record Official record
Conditions
Secondary Hyperparathyroidism, Renal Failure, Chronic Renal Insufficiency
Interventions
Hectorol (doxercalciferol capsules), 0.5mcg
Drug
Lead sponsor
Genzyme, a Sanofi Company
Industry
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
17
States / cities
Phoenix, Arizona • Alhambra, California • Riverside, California + 14 more
Source: ClinicalTrials.gov public record
Updated May 4, 2015 · Synced Sep 26, 2026, 8:32 PM EDT
Completed Phase 3 Interventional

Hepatic Dysfunction, Vitamin D Status, and Glycemic Control in Diabetes

NCT02132442
View directory record Official record
Conditions
Type 2 Diabetes, Nonalcoholic Fatty Liver Disease, Vitamin D Deficiency
Interventions
Ergocalciferol, placebo
Dietary Supplement
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
10 Years to 50 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 9, 2017 · Synced Sep 26, 2026, 8:32 PM EDT
Completed Phase 2 Interventional Results available

Study of the Safety, Pharmacodynamics (PD) and Efficacy of KRN23 in Children From 1 to 4 Years Old With X-linked Hypophosphatemia (XLH)

NCT02750618
View directory record Official record
Conditions
X-Linked Hypophosphatemia
Interventions
Burosumab
Biological
Lead sponsor
Kyowa Kirin, Inc.
Industry
Eligibility
1 Year to 4 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
3
States / cities
New Haven, Connecticut • Indianapolis, Indiana • St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated May 5, 2024 · Synced Sep 26, 2026, 8:32 PM EDT
Completed Not applicable Interventional

Correlation Between Vitamin D Status and Bone Mineral Density in Patients With Hemophilia

NCT01090206
View directory record Official record
Conditions
Hemophilia A, Hemophilia B, Vitamin D Deficiency
Interventions
Vitamin D and calcium
Dietary Supplement
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
2 Years to 21 Years · Male only
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Apr 28, 2016 · Synced Sep 26, 2026, 8:32 PM EDT
Recruiting Phase 1Phase 2 Interventional

A First-in-human Study of KK8123 in Adults With X-linked Hypophosphatemia

NCT06525636
View directory record Official record
Conditions
X-linked Hypophosphatemia
Interventions
KK8123
Drug
Lead sponsor
Kyowa Kirin Co., Ltd.
Industry
Eligibility
18 Years to 65 Years
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
5
States / cities
San Francisco, California • New Haven, Connecticut • Indianapolis, Indiana + 2 more
Source: ClinicalTrials.gov public record
Updated Sep 20, 2026 · Synced Sep 26, 2026, 8:32 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Effect of Vitamin D3 Supplementation on Insulin Resistance and Cardiovascular Risk Factors in Obese Adolescents

NCT00858247
View directory record Official record
Conditions
Obesity
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Mayo Clinic
Other
Eligibility
12 Years to 18 Years
Enrollment
51 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 19, 2014 · Synced Sep 26, 2026, 8:32 PM EDT
Active, not recruiting No phase listed Observational

X-linked Hypophosphatemia Disease Monitoring Program

NCT03651505
View directory record Official record
Conditions
X-linked Hypophosphatemia, Hypophosphatemic Rickets
Interventions
No intervention
Other
Lead sponsor
Ultragenyx Pharmaceutical Inc
Industry
Eligibility
Not listed
Enrollment
782 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2032
U.S. locations
24
States / cities
Birmingham, Alabama • Los Angeles, California • San Diego, California + 18 more
Source: ClinicalTrials.gov public record
Updated Aug 27, 2026 · Synced Sep 26, 2026, 8:32 PM EDT
Completed Not applicable Interventional Results available

Treatment of Vitamin D Deficiency in Intestinal Rehabilitation Clinic Patients With a Portable Ultraviolet B Lamp

NCT01930539
View directory record Official record
Conditions
Vitamin D Deficiency, Short Bowel Syndrome
Interventions
Ultraviolet B lamp
Device
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Oct 3, 2023 · Synced Sep 26, 2026, 8:32 PM EDT
Completed Not applicable Interventional

Acute Effect of Systemic Stress on Measured Blood Concentrations of 25 (OH) Vitamin D

NCT02460211
View directory record Official record
Conditions
Cardiovascular Disease, Vitamin D Deficiency
Interventions
Vitamin D3, Placebo
Dietary Supplement
Lead sponsor
Intermountain Health Care, Inc.
Other
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2020
U.S. locations
1
States / cities
Murray, Utah
Source: ClinicalTrials.gov public record
Updated Apr 4, 2021 · Synced Sep 26, 2026, 8:32 PM EDT
Completed No phase listed Observational

Vitamin D Levels in Children Undergoing Adenotonsillectomies and Controls

NCT00829972
View directory record Official record
Conditions
Tonsillitis
Interventions
Not listed
Lead sponsor
University of Chicago
Other
Eligibility
1 Year to 12 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 5, 2023 · Synced Sep 26, 2026, 8:32 PM EDT
Completed Not applicable Interventional

Vitamin D for Muscle Metabolic Function in Cancer Cachexia

NCT03144128
View directory record Official record
Conditions
Cancer Cachexia, Vitamin D Deficiency
Interventions
Vitamin D, Placebo
Dietary Supplement
Lead sponsor
David Travis Thomas
Other
Eligibility
45 Years to 75 Years
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Oct 13, 2020 · Synced Sep 26, 2026, 8:32 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

The Variability of 25-hydroxyvitamin D Response From Crystalline 25-hydroxyvitamin D3

NCT01633658
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
cholecalciferol, 25(OH)D
Dietary Supplement
Lead sponsor
Creighton University
Other
Eligibility
20 Years to 60 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated May 28, 2013 · Synced Sep 26, 2026, 8:32 PM EDT
Withdrawn Not applicable Interventional

Vitamin D Repletion and Maintenance in IBD: How Much and How Often

NCT03053414
View directory record Official record
Conditions
Inflammatory Bowel Diseases, Vitamin D Deficiency
Interventions
Vitamin D (ergocalciferol and/ or cholecalciferol)
Dietary Supplement
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years to 85 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 20, 2018 · Synced Sep 26, 2026, 8:32 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Biomarker Identification in Orthopaedic & Oral Maxillofacial Surgery Subjects to Identify Risks of Bisphosphonate Use

NCT01875458
View directory record Official record
Conditions
Osteoporosis, With or Without Treatment, Bisphosphonate Treatment, Atypical Femur Fracture, Bisphosphonate Related Osteonecrosis of the Jaws (BRONJ), Healthy Volunteers
Interventions
Not listed
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
314 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 12, 2023 · Synced Sep 26, 2026, 8:32 PM EDT
Completed Not applicable Interventional

DAILY: Vitamin D, Aspirin, ExercIse, Low Saturated Fat Foods StudY in Colorectal Cancer Patients With Minimal Residual Disease

NCT05036109
View directory record Official record
Conditions
Colorectal Cancer, Colon Cancer
Interventions
Aspirin, Vitamin D, Diet, Physical Activity, Behavioral Support Counseling Sessions
Drug · Dietary Supplement · Other + 1 more
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 9, 2026 · Synced Sep 26, 2026, 8:32 PM EDT
Recruiting Phase 3 Interventional

Vitamin D for Prostate Endocrine Therapy

NCT05838716
View directory record Official record
Conditions
Stage I Prostate Cancer AJCC v8, Stage II Prostate Cancer AJCC v8, Stage III Prostate Cancer AJCC v8, Stage IVA Prostate Cancer AJCC v8
Interventions
Biospecimen Collection, D Vitamin, Dual X-ray Absorptiometry, Placebo Administration, Quality-of-Life Assessment, Questionnaire Administration
Procedure · Dietary Supplement · Drug + 1 more
Lead sponsor
University of Rochester
Other
Eligibility
50 Years and older · Male only
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2029
U.S. locations
51
States / cities
Newark, Delaware • Danville, Illinois • Decatur, Illinois + 39 more
Source: ClinicalTrials.gov public record
Updated Jan 14, 2026 · Synced Sep 26, 2026, 8:32 PM EDT